breast augmentation 8000

we're going to head to thebedroom and the lab to unlock the mysterious worldof sex we all live in. to discover the truthbehind the female orgasm, we'll watch as a woman climaxesin the name of science. prof komisaruk: startgenital stimulation. monica: donating an orgasm forscience, how bad could that be? narrator: reveal howmicro-machinery allowed a man to experience an erectionfor the first time. colin: ...that's was athirty-thousand dollar erection

that you just saw. see if a pick up artist can helpa 30 year old virgin overcome his fear of approaching women. kurt: ...just wondering whereyou got your fancy outfits at, they're... they're neat! narrator: and find out ifalcohol really does make people more sexually attractive. pop girl: one drink andjust start making out, have a good make-out session,and i'm ready to pull off

my pants for you. rob: sex is for fun, sexis for, uh, excitement. tiffany: with me being a virginthere are some things i just won't know until we have sex. colin: being surrounded by otherguys in hockey locker rooms the conversation of sexcomes up all the time. narrator: to reveal just how sexworks we're going to take you on a journey from virginity,via arousal, to birth. and where better tostart, than a bar?

a place where humans have beenhooking up for generations. but this isn't just any bar;we've tricked it up with the latest gizmos, to show how evenwhen you think you're in control it's your sex drivethat's doing the talking. meet our volunteers - 8 men and8 women who've never met before and who, for now,are being kept apart. dr linda: be as honest as youcan we'll see where we all are at the end ok? narrator: the expert in chargeis dr linda papadopoulos

psychologist and sex expert. dr linda: sex drive is integralto the human condition, without it, humanity aswe know it would die out. we need to have sex drive. narrator: dr linda is goingto subject the volunteers to a series of tests to reveal ifchoosing a potential sex partner is a conscious choice or onemade by our sex hormones. and the first step is spottinga face we like the look of. dr linda: this is just abouttrying to see how aware we are

of what we like. male participant: .... if shegives me a little challenge, a little push, maybesome attitude, some sass! y'know, i like that. dr linda: if we are talkingabout evolution it's all about passing on your genes and whatyou want in a future mate. narrator: the first part of thetest is to see if pictures of the women will arouse the men inways they're not even aware of. dr linda: men tend to be morevisual that women when it comes

to what they find enticingwhich partly to do with how men are socialised. if you look at the vast majorityof pornography out there... vast, vast majority, it'sdirected towards men. this is jon... hi... hi how are you doing... so what we want to do it see howyou respond to different images of women. so we're going to doa couple of things,

this is a galvanic skin responsemonitor so it's gonna basically just look at howyou are reacting. we're also gonna look at pupildilation and finally we're gonna get to look at how you lookat faces through our imaging techniques. ok?male participant: ok, cool. narrator: what the men don'tknow is that they're going to meet the women inthe pictures later. jon: ok, you're good to go.dr linda: we're done? ok, so just come through here.

so make yourselfcomfortable on the stool. this is the eye trackingcomputer so basically what it'll do is it'll interpret howyou look at different things. beyond that, enjoy lookingat pretty girls, ok! male participant: ok. dr linda: we are using an eyetracking technique to look at where people look, but atwhere they look the longest. what you find is that we'll havethese big red dots on everyone's face so if they look at theeyes the longest, the red dots,

they'll be over the eyes, ifthey look at the lips they'll be over the lips. narrator: other devices willalso monitor changes in heart rate, perspiration levelsand pupil dilation, to reveal physical and emotionalresponses that the men have no control over and may noteven know are taking place. when a man sees an attractiveface the so-called reptilian part of his brain can reactby triggering the release of neurotransmitters such asepinephrine - accelerating

the pulse, sweat productionand increasing pupil diameter. the man's body is now primedto pursue the object of desire. by analysing how themen's' bodies react, dr linda can see which ofthe women excites the men at a biological level. dr linda: how was that? male participant: that was good. dr linda: a couple of girlspiqued you interest there .. i wonder if you areaware of what we saw?

which are the 2 girls...? male participant: possibly,yeah, there was one or two, yeah. correct, yes! narrator: the data indicatesit's the women with thicker lips and larger eyes that getthe men's hearts pumping. this could be because thesefaces point to a greater level of fertility, as females withsuch features tend to have more of the sex hormone oestrogen. hi! hello...

the results from onesubject stand out. chris's biological signs reveala high level of arousal when he looks at the pictureof katherine. male participant: i waslooking at hair colour and eyes and teeth actually,i was looking at teeth. dr linda: well how i wanted tosay interestingly what we found it when girls were smiling,really kind of focused and engaged on their mouth, butthere were a couple of clues there as to who you mayhave liked more than others.

male participant: interesting.. narrator: while a smile canincrease a woman's sex appeal, smiling men have been foundto be less sexually attractive to the opposite sex. dr linda: jon will take alook at the bio feedback. jon: i would suggest that,you might not think it, but there's actually twogirls there that you favor. narrator: next dr linda wants todiscover what sort of body type arouses the men.

dr linda: hi guys. thanks fordoing the eye tracking earlier. so what we're going to do nowis we're going to flash up the images with the differentwaist-hip-ratio test. so again, what we need youto do is circle the number of your preferred figure. you know, just waittill we see all six, and you can circlewhich one you prefer. what a lot of the appearanceresearch has shown, is that there's almost thissort of divine proportion

when it comes to the ratiobetween the waist and the hips. traditionally, a very slimwaist with bigger hips, a sort of hour glass figure iswhat's particularly attractive to men. and there's a lot of theoriesput forward of more rounded hip being more child bearing hipsand smaller waist being of conducive toyouth and health. narrator: one other physicalattribute also catches the mens' eyes.

dr linda: sincewe've become bipedal, since we've kind of evolved fromwalking on all fours to standing on two legs, it's interestinghow sexual lures have adapted. it's become much morecentered around the breasts, y'know i guess the breasts arethe new buttocks .. the fact that the breasts are right underthe face which is always what we focus on, certainly helps. thank you for that... we'll take a look at them.

i like that this is foldedup, that just worries me. narrator: the initial tests showsome of the men are turned on physiologically by anumber of the women. we'll find out a bit laterif the women share those same feelings towards the men. but first let's check out howsex works in the real world. and in this.... we're going to followladies' man - rob, and reveal the extraordinarycontrol sex hormones exert over

his mind and body in hispursuit of a sexual encounter. rob: sex is for fun,sex is for excitement. i had numerous one night stands. i'm 27. i'm definitely notready to settle down. i meet a lot of people,see a lot of girls, hang out with a lot of girls,hook up with a lot of girls. my friend, cos she knows idon't carry condoms on me, she got me this for my birthday,and it came with three condoms

in it. needless to say, it onlylasted me one night, but still i can justput condoms in it, and you know i'mready to go out. narrator: tonightrob's on a mission, with one simplegoal - to have sex. rob: i've had sexwith a lot of girls... it's fun! sex is fun! narrator: to improve hischances of finding a sexual

partner rob's broughthis wingman, brian. brian : step into my office...rob: i set the tone! dr linda: men have a highersex drive than women. a women needs to invest in isin one person who's going to be a great parent helpingher raise that child. from a male's point of viewit's going to be about having the most chance to get thosegenes to survive by having sex with as many partnersas possible. brian: you guysseen any girls here,

is there any chicks around? brian: we go out all the time,almost every single night. i don't have television orinternet at my apartment, i would much rather goenjoy the night life. guy: if they're hotthey're taken ... brian: if they're hotthey're taken, huh? so, yeah... let's try and talk tosome of these taken women. narrator: as with most men ofhis age rob thinks about sex

around 20 times a day,twice as often as women do . rob lays down his best lines,but it's his testosterone that's really doing the talking. and for single men like robit's testosterone that dictates sexual appetite and thepursuit of a potential mate. rob: well you girlshave a very good night. narrator: just talkingto an attractive girl, can trigger your testicles tostart pumping testosterone out. in no time yourbrain's awash with it,

the result - you increaseyour efforts to get the girl. rob: you gotta have sex! you gotta be healthy. i think sex is healthy! narrator: rob is right, womenwho enjoy sex regularly live longer than those that don't andmen who have sex 3 times a week can cut their risk of heartdisease and stroke by half. brian: you girls, hey girls.. rob: excuse me ladies...

brian: you're in dangerof being empty handed. would you care for a drink?can i get you one? girl: sure! brain: what'll it be? girl: jack and coke...brian: jack and coke... girl: surprise me... rob: you can't get a home runif you don't take a swing. so, you gotta, atleast give it a shot. shot!! yeah!

i think sex is oneveryone's mind, whether they liketo admit it or not. narrator: one study found thatpeople below the age of 25 thought about sex up to388 times in one day. i think about sexabout every 11 seconds. a girl's talking tome and i might think about sex three or four times in theconversation that we're having so it does add up yeah. man, i thinkabout sex all the time,

i think sex is very importantman, - highly sexed individual. i love females - ha! narrator: we'll catch up withrob's attempt to find a willing sexual partner later. in the sex lab, it's time todiscover if the way the women think about sex isdifferent from the men. dr linda: so, this is theeye tracking computer... have a seat... so very simply, it's going tobring up a series of photographs

for you to enjoy, to look at. we just want you to completelyrelax and enjoy looking at the pictures. hi, i'm dr linda,what's your name? female: oh, i'm katharine. narrator: almost immediatelykatherine's pulse rate, perspiration and pupil dilationall jump when she looks at pictures of jack and chris. dr linda: there was two guysthat katharine really liked and

we saw it from the galvanic skinresponse, it was a real spike. we saw it in herbehavioural reaction. we saw that she stood back,she smiled right away, but we also saw that she keptthat gaze a little bit longer. female: yeah, i think men'seyes are one of the first places that i look... and their smile. narrator: although significant,katherine's biological responses aren't as great as the resultsseen when chris looked at katherine's face.

like men, female sex drive isalso powered by testosterone, but at a fifteenth ofthe level seen in males, so the effect isa lot more subtle. female: i've done a fair amountof online dating as well, so i know that people canupgrade pictures and can look great and then i meet themand i'm like.. 'where was that personality i saw in the photo! dr linda: what we're beingable to see with this, is what women are tunedto more in male face.

narrator: a pattern is forming. it appears the more symmetricalthe man's face the stronger the women's response. dr linda: thereason for this is, the assumption that if thingsare symmetrical on the face then it's indicative ofgood health, of good genes. so if you want to takeit to its basest level, y'know we're always searchingout for a mate to pass on our genes and symmetry isone of those big indicators

that persons genes are healthy,they're good and that'll mean that if they mix up with mygenes they'll have a better chance of survival. narrator: the results provideboth conscious and biological clues to who the subjectsfind sexually attractive. can the scientific data predictwhich couple will hook up? and will everything changewhen the volunteers meet face to face? there's no secret why humanshave evolved to have sex

to reproduce. but nowadays most of us doit for the intense pleasure it provides through orgasm. and while three-quarters of menregularly orgasm during sex, less than a third of women do. woman: very importantto orgasm during sex. if not it's just like, you getirritated release you ain't release nothing. all that tension. i got toexplode. what about you?

man: yeah. pretty much the same. i think it's reallyimportant to have an orgasm.. i want to make him feelgood' 'well for her, i mean i think sex is allabout the girl so if she, like, orgasms, then it's likepressures off - i'm good! narrator: but one of the greatmysteries in understanding how sex works is why do women,who can conceive without them, have orgasms at all? dr linda: why women orgasmis a bit of a conundrum,

it's sort of like sayingwhy do men have nipples. some evolutionary psychologistsbelieve that this is sort of a throw back to a physiologicalprocess that we have that we don't reallyneed as such. yet for others it's seen thatthere's certainly a function there that we haven't stillfigured out what it is. narrator: in new jersey, agroup of neuroscientists are attempting to unlock themystery of the female orgasm. komisaruk: there really areonly a couple of laboratories

in the world studying, um,sexual response to orgasm. we study brain responseto genital stimulation, the pathways leading to orgasm,the orgasm response in women and then how it resolves. narrator: to help thescientists' research, this woman is going toattempt to reach orgasm in the distinctly unsexyconfines of an mri scanner... komisaruk: startgenital stimulation. narrator: at a speciallaboratory in new jersey,

this woman is about to performa most intimate act in front of a gallery of scientists. the goal? to try to understand onceand for all why women orgasm. scientist: hi i'm nanwise, nice to meet you, and this is drbarry komisaruk... komisaruk: i'm fascinatedwith the process of orgasm. hi nice to meet you...dr. steven... monica: well yeah it's a littlenerve wracking to have an orgasm

in an mri with somany people around. i don't usually have suchan audience when i'm doing something so private. komisaruk: this idea of seeingwhat parts of the brain get recruited and aroused andactivated leading up to a crescendo of one of .. uh..themost pleasurable experiences in humans is a umm, a veryinteresting phenomenon to study. can we overcome depression, oraddiction or overcome pain by understanding what partsof the brain are active

and changing those. we really need some hardevidence about the functions of orgasm. scientist: ok so before we getstarted do you have any concerns about today? any trepidations, worries? monica: other than the nineguys in the room, i'm good! scientist: ok! komisaruk: what we are gonnado is the control orgasm first,

and then rest for five minutesand then the actual orgasm. monica: you realise what youguys are calling control orgasm, we call faking it! the only time most peoplego into an mri is if there's something wrong,you know, they may be, they are going to seeif have a brain tumour, they have something goingon with their brain, and i'm going in oneto have an orgasm. yeah, this isn't the sexiestenvironment i've ever been in to

have an orgasm, i wore a littlelace underneath to kind of help me out in there so i wouldfeel a little sexier in an mri, but donating an orgasm forscience, how bad can that be. komisaruk: it's comfortable?not too tight? monica: it's ok.komisaruk: it's ok? scientist: ok now i amgoing to send you in, you can open your eyes. komisaruk: monica areyou in position to start? monica: yes. i am.

komisaruk: monica, startgenital stimulation. narrator: like 75% of womenmonica usually achieves orgasm by clitoral stimulation. the tip of the clitoris hasaround 8000 nerve endings, twice as many as the tipof the penis and more than any other part of the body. komisaruk: there are differentnerves from the genital system and stimulation of thosedifferent nerves goes to different parts of thebrain and it produces different

qualities of orgasms. narrator: as a woman becomessexually aroused her vagina can expand up to 200%,while self lubricating. scientist: is she doingthe external stimulation? narrator: some studies showedthat the average time it takes a woman to reach orgasm throughmasturbation is 4 minutes, with the climax lastingaround 20 seconds. men on the other hand tend toorgasm in just 2 and a half minutes, peaking forapproximately 12 seconds.

komisaruk: well an orgasm isa, response in the brain that controls many differentsystems in the body. there are many physiologicalaccompaniments to orgasm increase in bloodpressure and heart rate, increase in pupil diameter... these are the brain regions thatare activated by the stimulation that she's applying. certainly the genitalsensory cortex is activated. so we should be seeing...some activity...

scientist: she pressed thebutton at forty five thirty four scientist 2: whooo!! narrator: orgasms can also causethe brain to block pain signals. a recent study suggestsclimaxing can be as effective as three doses of morphine. komisaruk: monica are you ok?you're done, you did great. ok! monica: it was comparable towhat i might have on my own any other time, not quitecomparable to with company,

i prefer with company! female orgasms may alsohave another crucial reproductive role. komisaruk: there is evidencethat one of the functions of orgasm is to increase uterinecontractions that can suck sperm into the uterus. and that could have an effectof adding to the likelihood of pregnancy. monica: i went to my happyplace and got happy so hopefully

the scan will, you know,tell the story. my hope is that a studylike this would actually prove what i already believeabout orgasm which is that it is essential to our being. narrator: the pleasure weexperience during orgasm is believed to encourage us tohave as much sex as possible. and in men orgasms could alsoplay a key role in driving ejaculation. jackson: if you've got a goodsperm count you're making

something like a 1000sperm per heartbeat. you can ejaculate hundredsof millions of sperm per day. narrator: when a man ejaculateshe produces on average over 200 million sperm. enough to populateover half of the us. so, why do menmake so many sperm? to help find an answer,these five students are going to compete in a sperm race. jackson: what we're going todo today is have a look at

your individual semen samplesand then do a little race. now if we look at sperm and welook at how they're swimming, we can see these sperm that areswimming fast across the field and their heads movinga bit from side to side. but there's also lots of bitsof cell debris and some sperm that are not swimming at all,others that are just twitching. when they arrive in the vagina,it's horrible acid environment and most of the sperm aregoing to die instantly, so after an hour white bloodcells appear and they're gonna

kill all of those spermthat are in the cervix. so you've got one hour to getfrom treacle a third of the way up everest otherwiseyou're dead. so what we're gonna dotoday in our sperm race, we'll look at how many get toa certain distance and also how far the furthest sperm can swim. male participant: i'd beabsolutely gutted if i had low sperm count. narrator: dr kirkman-brown asksthe volunteers to provide sperm

samples. wrapped inside a testicle aretubes over 20 feet long that produce over one hundredmillion sperm every day. yet despite their huge numbers,sperm only make up a tiny fraction of the semen. the rest is food for thejourney and chemical protection. when a man ejaculates, semensquirts out at around 28 mph followed by anintense rush of pleasure. a reward for a job well done.

it's now time to count thevolunteers' sperm and calculate how fast and far they swim. jackson: you've had a bit oftime away while we have done the processing in the lab. obviously i have got a clipboardwith results on it and some data for us to look at - are peoplefeeling a bit more nervous now? boys yeah, a littlebit nervous now. boy 1: the problem is i canonly think about sperm now.... sperm... sperm...sperm..

jackson: first of all we justhave some data which is just on the neat semen samples. but we have got quotea big range of results, so we've gone from in the regionof 45/46 million sperm to one of you having in theregion of 1 billion, 500 million spermin the ejaculate. tom is our hero with over abillion sperm in his ejaculate did you realize you were abillionaire this morning? tom: i always felt there wassomething special about me

but it's nice to know thereare a lot of guys in there... jackson: is it something youwill now tell your friends about? tom: i will nowyes, definitely! jackson: the final thing welooked at was which sperm got the furthest fastest... we have tyler as awinner on this one. boy 1: ...unbelievable.. narrator: in one minute tyler'ssperm covered a fifth of an inch

which may not sound much, but it's equivalent to a humanswimming through syrup faster than the best olympic swimmer. jackson: what you'd have is thatfirst sperm would be getting the best chance offertilize that egg. so in this test that we haverun today and the results may be totally differenton another day, then tyler would havebeen the winner at that. boy 1: pretty like, over themoon about it - cos it's always

been a um... at the back of myhead, like, would i be alright if i wanted to have kids. narrator: despite the hugenumbers of sperm produced, over 99.9% will be killed by thetime they reach their target: the egg. this obliteration is one ofthe key reasons why men have to produce so much spermin a single ejaculation. most people will havemore than one sexual partner in their lives, so whydo so many of us end up

in a monogamous relationship? could this soon to be wedcouple help provide an answer? tiffany: ..being a virgin, thereare some things that i just narrator: ryan and tiffany havebeen together for 2 years but have never had sex. in 5 days, on theirwedding night, that's all about to change. ryan: why we decided to abstainfrom sex before marriage in our relationship mainly stems backfrom our religious background,

and our beliefs. we really wanted to cultivate agood friendship and we know that when a lot of other things arethrown into it like a sexual or physical relationshipin the beginning, you miss out on a lot of things. tiffany: and of course, youknow, with me being a virgin, there are some thingsthat i just won't know until we have sex. ryan: temptation is definitelyalways there and especially

when you're sitting nextto your future wife. i mean if were home alonelate, obviously i'm going to be tempted so it's really avoidingthose situations completely, which really helps a lot. tiffany: i'm not going to lieand say that it's been easy for us to not have sex. ryan: it's a very rare thing,and i'm not saying that to be like to be like pat ourselves onthe back but it takes a lot of discipline.

narrator: for his bachelor partyryan heads to the shooting range although tiffany is avirgin, ryan is not. ryan: it is tiffany's firsttime and it's not mine. i did make some decisions inthe past to go ahead and have relations with oldgirlfriends and so, those... what i thought was love, was notlove how it's supposed to be, it was more physical,selfish, what can i get out of this relationshiptype of thing and so... good things are worth waitingfor and worth working towards

and it's gonna be a hugeblessing to experience this and y'know i love tiffany so i'mgonna wait for her and protect her and not bephysical ahead of time. all of this building up,it's gonna lead to a great experience. narrator: couples who aredeeply in love produce more of the pleasure hormone dopamine,that can increase the enjoyment of having sex. will ryan and tiffany'sfirst time be all the better

for waiting? tiffany: there is a little bitof nervousness and i think a lot of it is just because i'venever had sex before so. it's just an unknown, notknowing what to expect and not knowing, y'know how it's gonnafeel and how i should react and different things like that. we plan on having sex forthe rest of our lives, so we've got enoughtime to learn! narrator: tiffany is a rarity,as only 5% of people in the us

are virgins ontheir wedding day. with most people havingsex at the age of 17. my first timeawkward, quick and fun. i would say awkwardand eye-opening. well i lost mine in high schoolin like tenth grade so like sixteen. well, just theage that i regret, if i could turn back the handsof time i would have waited 'til i was at thatright age you know.

i was 15, the girlwas seventeen, we were drinking and youknow had some fun that night, of course used protection,i was a little nervous, a little scared but youknow, eventually you know, i got to use of it andstarted working it out. i was twenty when i lost myvirginity and i was embarrassed 'cos i was so old. it was my first, like, real truelove and i decided it was a good idea.

he turned into a realdouchebag who stole my bike, my camera and my phone and heslashed my car tyres so probably could have picked him better! narrator: in the sex lab thetests to discover how our sub-conscious responses controlour choice of sexual partner continue. it's time for the male andfemale subjects to meet for the first time, in a controlledspeed dating experiment. will their initial biologicalreactions reflect how they

respond to each other in person? how, how is it been so far? dr linda is interested tosee how katherine and chris, the couple who responded themost to pictures of each other, react when they meet. female participant: regardlessif it'll be fun, but, there were two guys inparticular that kind of stood out. there were a couple of guysthat i thought were attractive,

i'm just hoping that i havea pleasant two minutes. dr linda: ok john can you, canyou fit amy out with these... narrator: eye-tracking glasseswill let us see if there's a difference in wheremen and women look. female participant: ...i'stotally.... i'm really nervous. i'm just hoping that whoeversits across can see past my glasses ... to the real me. dr linda: let's bring in theguys - can i have chris come in, please?

the way that we matched you wasbased on all these biometric results, so all the stuffthat we've been doing; what got your heart fluttering,what got their fluttering it's based on that. william? ok william.male participant: how are you? narrator: the females' eyes tendto lock on to the faces of men with more masculine featuressuch as a strong jawline and a broad forehead. but with amy's heart rate andperspiration levels remaining

constant, it's possible thatnone of the men are exciting her at a biological level. the male subjects eyes quicklydrift to the breasts even the briefest of glances, see ajump in heart rate and sweat. the reptilian part of thebrain has really kicked in. dr linda: it's reallyinteresting because when you do research like this you cankind of see them interacting on that kind of 3d level of reallygetting to know it each other. you can see sparksflying especially,

and very interestingly, with thetwo that were rated the highest. ok guys! stop! how has it been amy? female participant: i don't know- it's fun, it's interesting. male participant: it's beenawesome, beautiful smile. it's awesome to interactwith her. ah, fun! narrator: as a species we'regenetically programmed to seek out a sexual partner.. yet for nearly 15 million peoplein the united states approaching

a member of the opposite sexis a terrifying experience. but is there a way of overcomingthis so-called approach anxiety? 30 year old kurt hopes so, thestress he feels is so extreme he's still a virgin. kurt: i have never had agirlfriend, never had sex. as far as being a virgin goes,as more as i'm getting older, it's more of aburden on my mind. when it comes to talking tothem, i don't know what to say, i clam up, i get very nervous.

our other friend was here withme and uh...there was like 5 girls or something like thathe was talking with them and chatting them up and everythingand i thought it was a good opportunity to gotalk with them... no.... they all got up! i don't know dude. i don'tknow what the problem was. what am i doing wrong? i've been following thepick-up community for a couple of years now.

narrator: desperate to get overhis phobia of talking to women, and to finally have sex, kurthas contacted professional pick up artist beckster. kurt: i came across becksterthrough a friend of mine. him and i started chattingand talking about pick up and everything else and that iwould like to train with him. bexter: when you seesomeone you like, you have to go and talk tothem within 3 seconds... beckster: yeah.. go!

if you wait too long, themoment's gone for one, it's not spontaneous for two,it seems unconvincing and unnatural, and also you can goinside your mind and think of excuses not to approach,and that's called analysis paralysis. so you actually convinceyourself not to go and do it. go back and askfor her facebook, tell her you want to inviteher to a fancy dress party. just go and talk to people,y'know we're all human beings.

narrator: will beckster beable to help kurt find a woman? kurt: excuse me ladies,how are you this evening? narrator: 30 year old virginkurt has arranged to meet professional pick up artistbeckster, in manhattan, for an intensive one on onecrash course in seduction. beckster: i got into learningthese seduction techniques for my own benefit, because about 15years ago i was in a worse place than kurt was and i reallyneeded to get out of my shell. i really had no femaleinteraction whatsoever,

no female friends or nothingand so i was stuck in a rut. today i've got somemissions for you... kurt: ok... beckster: the first mission is,i want you to ask some girls just where a good coffee shop iskurt: yeh, yeah.. excuse me miss, i was justwondering if there was a good coffee shop... girl: ah, i don't know sorry! kurt: .... i was wondering ifyou wanted to go for a quick cup

of coffee with me? girl: um, no, i'm late.i'm sorry. kurt: you are? ok.thank you then. i'm actually going to a partya bit later on this evening, i was wondering if icould invite you to it? girl: again, i'm sorry, ihave to decline... beckster: you gotta spin,you get a spin for that! so i'm going to get you totalk to a few people, ok, and just say somethinglike, you have a great vibe

and i know it's a busy citybut you're still shining out above that, ok go tell her you likeher boots as well, go! go , go-go-go! kurt: i am very not used tothis, but i'll give it a go! beckster: as soon asi say go, just go, don't think about it oryou'll get analysis paralysis. ... go! go! y'know for some people thisis harder than going to war.

they'd rather fight in a warthan they would talk to a girl on the street. kurt: it's not that i'm notready to have sex or lose my virginity, it's the fact it'snervousness goes on in my head. narrator: the rootof kurt's problem, and others who sufferapproach anxiety, lies in how a part of theirbrain assesses if the potential pleasure of sex is worthrisking the pain of rejection. the limbic system controls ourbody's most primal instincts:

to fight, flight,feed or fornicate. and when kurtapproaches a woman, memories of past failureswarn the limbic system that the threat isgreater than the reward. resulting in a rushof stress hormones, that increase his pulse andsweat levels so much he starts to feel distressed, even sick. kurt: excuse me, just wonderingwhere you got your fancy outfits at, they're... they're neat!

beckster: rejection's probablythe worst things that people fear in this , becauseno one wants to be rejected, but we have to learn thatrejection's not personal because they don't know you yet,and he needs to see that. he's learnt major lifelessons very quickly. simple things like don't leanin when you talk to a girl, smiling when you go in and maybea small touch of the elbow. these things heighten sexualarousal and that's how we find a mate.

he's gonna eventually findpeople that do want to go on dates with him and go forcoffee with him and have sexual relations with him. am i doing this right? am i not doing this right? how is she feeling about this? how am i feeling about this? it's just a whole differentcycle of things going through my mind.

beckster: this is how you learn,but going back and taking that risk, alright?kurt: huh... beckster: the answer is always'yes' when you want to learn something.kurt: right. beckster: you wanna learn this?kurt: ....yes. narrator: by repeatedly facinghis fear kurt can reduce his limbic system's threat response. kurt: i only have a few minutes,i'm in town for a couple hours i'd like your opinion, whichis more important to you,

to be wanted, or needed? girl: i mean, i think wantedis probably the right thing to say..kurt: ok... girls: hiiiiigh!kurt: maybe i..... you both have verystylish fashion sense... girl 2: thank you darling,alright let's go.. girl 1: does thatanswer your question? kurt: sure... you have a greatnight ladies... thank you. beckster: you haveto go back then yeah? ok?

kurt: sorry ladies, i don'tmean to interrupt again, i just want to let you know, but i'm going a partya little bit later on, i'd like to inviteboth of you... if you wish. girl 2: we have plans, sorry...girl 1: where are you going? kurt: we're going toco-op restaurant and bar, it's near here. um, what i could do is i couldactually text message you, or somehow?

that way we could get incontact with each other a little bit later. beckster: he's doingreally well now.. kurt: i'm actually amusician as well, so.. girl 2: oh really?what do you play? kurt: ah, drums,bass and i sing. girl1: text me later ok? bye!kurt: definitely, definitely.. ok! thank you ladieshave a great night! beckster: see?

that's what i'm talking about,you had the guts to go back and you got what you want.kurt: that went super well. beckster: super well yeah?kurt: ha! ha! beckster: awesome. kurt: before yesterday, icould never do that, now, when i go home, i won't be asscared, i'll know what to do, or know what to say. i'll have positive...positivitygoing through me and knocking walls down and everything else.

beckster: welcome to the club! kurt: thank youbeckster, thank you! narrator: in the sex lab drlinda is exploring another tried and tested way of gettingover approach anxiety. dr linda: now here comesthe funnest part of all the experiments. all i need you to do now is dowhat you would normally do on any given eveningin a nightclub. i want you to mingle i wantyou to talk to each other

and i also want to see howthings change once we add alcohol to the equation. so if you guys can justenjoy a glass of wine, or a beer that would be great. well, enjoy each other!not like that! interestingly as soon as wementioned alcohol there was almost kind of a sigh ofrelief it's an environment that they're used to so they'refeeling a lot more confident; you can see theirnon-verbals now.

we're already starting tosee as well a lot of the more flirtatiousbehaviours happening, some sort of flickingof the hair for girls, you know the boys standing in acertain way with chests out kind of makingthat prominent and even in a few cases i've seenalready a lot of that mirroring that we often find when we likesomeone so we want to indicate that interest in if they touchtheir face we touch our face, if they lean forward we do,that's a real indicator of them

wanting to connect so it'sfascinating to see what's happening and howmuch more, rather, how much lessinhibited they are. how does the consumption ofalcohol affect our behaviour? dr alia ataya: once you consumealcohol it has a global effect across the brain so it resultsin lowering your inhibitions. you're more likely to engagein certain behaviours that you wouldn't normally engage in. dr linda: does the consumptionof alcohol mean that we'll look

at people more favourably whenit comes to attractiveness, is there a grainof truth to this? dr alia ataya: onceyou consume alcohol, you expect to engage inmore social behaviour, you expect to be more relaxed. you expect to meet peopleand you start to perceive individuals as moreattractive and favourable. narrator: as we drink one partof our brain after another is affected.

first the pre-frontal cortex,the part that tells us not to say or do the wrongthings, is suppressed, making us lesssexually inhibited. then the limbic system, ourrisk avoidance controller, is cranked down. with these areassmothered by drink, our sex hormones areallowed to run riot. alcohol can also increaseour levels of sexual desire. in women, drink can causea rise in testosterone,

increasing theirinterest in sex. and studies show it reduces ourability to spot facial symmetry, making us a lot less choosyan effect known as beer goggles. and the time the boys look atbreasts has risen from fractions of a second, toomuch, much longer. there's nothing better andgets me in the mood than just making out. i mean, really, one drinkand just start making out, narrator: back in la loungelizard rob discovers his tactic

of using a wingman to improvehis chances of finding a sexual partner has backfired. rob: brian is probably thebiggest ladies' man think i'll ever meet,he just slays women. brian: tonight we met a coupleof girls they were with a bunch of friends actually and all ofthe friends left except for one girl, she decided to staybehind with me so we are going to you know, go and play around. narrator: even though hishormones are driving rob to find

a partner, in humans it's oftenthe female who are the choosy sex, as they invest more inreproduction and parenting than males. and on this occasion it's brianwho's been chosen, not rob. rob: good stuff.lady, nice meeting you. nice to meet you... i didn't necessarilygo home with the girl, but brian did sothat's good for him, you know that's avictory for one of us.

i'm gonna go home all alone bymyself and cry myself to sleep. nah, that's not gonna happen. tonight was one of those nightsyou know sometimes it's not always about, meeting thehottest girl and having sex with them. you strike out some nights. narrator: rob knows it is onlya matter of time before he has sex, but for some men havingintercourse can prove to be an impossibility.

at 22, ice hockey coach colinshould be at his sexual peak, yet despite having girlfriendshe's always failed to have an erection. colin: i would describe myselfas a very athletic person, whether it's going to the gymevery day, going for a run, playing hockey. all through my youth and teenyears i was never able to have being surrounded by otherguys in hockey locker rooms and the conversation ofsex comes up all the time,

i just started towonder, hey am i normal? what's going on?what's supposed to happen? narrator: colin is not alone, inthe us as many as 30 million men are regularly unable to get ormaintain an erection during sex. with the causesincluding stress, ageing, obesity andcirculatory problems. for colin the devastatingimpact the problem was having on his life, forced himto take drastic action. colin: it just toreme apart inside.

it was a constantweight that was on me, knowing that i couldn'thave sex with anybody. after going throughall the solutions, the answer was finallya penile implant. narrator: althoughstill in his early 20s colin has never beenable to have an erection. to try to understand why,he's turned to his dad. colin's dad: he called me onthe phone and asked if anybody in the family hadcirculation problems.

colin: yep. colin's dad: ...and isaid no, why do you ask? and you said well becausei can't get an erection. and i was at the other end ofthe phone and i think it went dead, you know, what? hecan't get what, an erection? well the first thing that's hardto deal with is knowing that your child has a birth defectwhich you helped create, you know, and it'sparticularly one that's like this, you know, so that's thefirst thing i have to deal with.

narrator: whencolin was examined, the doctors discoveredthat for some reason, there was a fault in the flow ofblood into colin's penis when he became sexually aroused, makingit impossible to build up enough pressure to produce an erection the most common treatment forerectile dysfunction is to take pills, such as viagra,that increase blood flow to the penis, but for colinthe drugs didn't help. it got to a point where i wantedto have sex so bad that after

going through all the solutions,the answer was finally a penile implant. narrator: it took surgeons overthree and half hours to insert silicon rods into the musclesof colin's penis that were then attached to a smallpump inside his scrotum. colin: alright, here wehave an implant bulb, which serves as apump and as a release. so in your lower abdomen areathere's a fluid reservoir and chords going all the way downinto the penile implant and into

the pump that's in the scrotum. in real life, ok, so we havethe sluice chamber goes down into the pump. when i want to get an erectioni just pump a couple of times and then all that fluid's in thepenis and i have an erection. when i wanna deflate, i grab thebulb and all of the fluid goes back out of the penis throughthe pump and that reservoir balloon kind of fills back up. that was a $30,000erection that you just saw.

it was a huge relief after icould finally have sex for the first time it was justlike this weight was lifted off my shoulders and i could finallyjust step outside and feel free. funny enough the first erectioni ever had lasted me ten weeks. male friend are you serious? colin: yeah because they putthe implant in at like 50 or 60% inflated, friend: what didyou do for ten weeks? stayed indoors!

he keeps joking around withme that i should be the first implant porn star. i can have an erection wheneveri want to for as long as i want to, something that was on mymind every day for my entire life up until thatpoint is now gone. so now i can have a boner 24/7. narrator: with hiserection restored, colin is able to enjoya healthy sex life. back in houston it'stiffany's bachelorette party.

she and her fiancã©,ryan, have never had sex. but with their wedding just3 days away that's all about to change. tiffany's friend:you're getting married! tiffany: ..in 3 days! tiffany's friend: are youmore excited or nervous? tiffany: i thinki'm more excited. tiffany's friend:about the whole thing? like, the wedding dayand the wedding night?

narrator: tiffany uses herbachelorette party to get some last minute tips. tiffany: i toldryan-- i was like, don't feel really bad ifjust start crying during our honeymoon for like no reason. and he's like, do you meanlike while we're having sex? i was like i didn'tmean that, but maybe! i've asked some people thati know and that i trust, just what to expect and, youknow, how to prepare myself,

you know, emotionallyand physically, and... friend: take it fromme who had no clue... you will figure it out and youwill find things that you like and you will find thingsthat you don't like, but you have got to talk. you have got to say that,i did not feel that... friend: yeah... but it's ok 'cause i mean you'remarried, so it's just like, ooh, i really likedthat, or don't do that!'

tiffany: some of my friendshave just recommended, you know, different lubricants to use andcondoms to use that, you know, won't bother you and do whateveryou can to help you relax and be comfortable together, naked,you know, for the first time! friend: i didn't reallyknow what sex was 'til after i got married. i mean, no, like, seriously,it's so different, it's so much better and 10years and 5 kids later... ...it keeps getting better!

girls ohh!friend: that's good news! narrator: finding somebody tohave sex with is one of our most powerful instincts, yet scienceis beginning to recognise a group of people who have nodesire to have intercourse they're known as asexuals. a recent study estimates thereare over 65 million asexuals worldwide. 21 year old student jenniidentifies herself as asexual. jenni: the basic definition isthat you lack sexual attraction

and for me it basicallyjust means that i don't look at people and think hmm. yeah, i'd have sex with you. i mean people are like, oh butif you've not tried it then how do you know? and it's like, well,if your straight, have you tried having sexwith someone, you know, of the same sex as you? how do you know youwouldn't enjoy that?

it-- you just kind of know thatif you're not interested in it, you're not interested in it,regardless of have you tried it or not? narrator: asexuality is becomingaccepted as a distinct sexual orientation, ratherthan a disorder, although science has yetto uncover the reason for the lack of sexual desire. jenni: there are people whodefinitely view it as a disorder and are like, oh, if we giveyou these pills we can fix it,

or people who ask you, haveyou had your hormones checked? as though that's theobvious solution, they totallyunderstand what it is. and then you have people whogo one step worse and i've been asked before if i havebeen molested as a child. narrator: although jenniisn't interested in sex, she has a boyfriend. jenni: come on you. hey you.

narrator: tim and jenni are afew weeks into their sexless relationship. tim: i mean, like, the firsttime that jenni sort of mentioned in conversation... jenni: in my very subtle way. tim: ...that shewas a-sexual, umm, well my initial thought was,hmm, that's kind of odd. but then i-- i did know enoughto know not to make assumptions sort of about what that meant.

narrator: even though asexualsare not sexually attracted to other people, research showsmany still have a sex drive which they satisfythrough masturbation. but even when couplesdon't have sex, studies have shown that kissingand cuddling can cause the brain to release oxytocin, a hormonethat's also released when people in sexual relationships orgasm. jenni might be happyto go without sex, but in la rob is not.

it's been 2 weeks sincerob last had intercourse, to satisfy the demands of hishormones he's turned to close friend brittany. rob: tonight, i'mlooking forward to, uh, to going out with...with brittany. brittany is a isa friend of mine. i'm pretty sure we're gonnago out and have a lot of fun, and then we'll probablymake our way back here. i'm pretty surethat's gonna happen.

the sex with brittany... it's good, yeah, definitely. yeah! really good,she knows what she's doing. but yeah, good sex. hello brittany.britanny: hi! rob: how are you?brittany: good. how are you? i mean i like hanging outwith you 'cause we have a really good time togetherand you make me feel good about myself.

it's just, you know, funand games but we're good friends...with benefits.rob: yeah. that's well put. sex is supposed to feel good,you're supposed to feel good after having sex and i don'twant to hook up with a girl that goes, ah, whatwhy did i do that? brittany: exactly, you wantto you don't want to wake up the next morning and say,i couldn't even tell you what she looked like, i can't eventell you her name,

i don't know whereshe came from. rob: do you have towake up early tomorrow? ...like, do youwant to sleep over? brittany: you can'tjust ask that, you have to get me drunk first. rob: i don't have toget your drunk first! you've stayed overabout fifteen times... brittany: i've onlyhad one glass of wine. rob: 'cos i need to know ifnot i'm going to call another

person. brittany: oh, youhave your line-up, i'm a loser... your booty-calls? rob: i'm joking. brittany: we shouldtalk about something... more juicy. rob: sexual? the plans for the rest of theevening is going to go like this: ah, we're goingto go and pick up, ah,

ingredients to make s'mores andbrittany is going to make her special whiskey cider, cookthat up and have a nice dessert, and then maybe more dessert. brittany stop. rob: there's nothing betterthan... than a nice kiss. it's the first spark, it'sthe first initial, you know, feeling. narrator: packed with nerveendings our lips and tongue are incredibly sensitiveto stimulation.

a passionate kiss causes ourbodies to go into pleasure overdrive; our pulseand breathing quickens, more oxygen rushes to ourbrain, pleasure hormones flow and our cheeks flush. not only does kissing arouseus, it can improve sexual gratification. with his hormones flooding hissystem rob's body is primed to have sex. oh, is that what you wanted...see i wanted that.. here take it

brainwashed by his sex hormones,rob's libido is in overdrive. he's turned to friendwith benefits, brittany. brittany: ah! rob: you taste likemarshmallow and gram crackers. brittany: inaudible oh please. ow! rob: c'mere baby!brittany: oh, jeez... ah! narrator: foreplay stimulatesa number of physiological responses.

in rob blood becomes trappedinside his penis causing it to swell and harden. the vaginal wallsthicken and lubricate. upon penetration nerveendings in the penis, clitoris and vagina arestimulated increasing activity in over 80 regions of the brain,including the pleasure centers, triggering thestart of the orgasm. as the orgasm builds pulsestravel from the anal sphincter to the tip of the penis.

these pulses increasein speed and intensity, until climax is reached,causing muscles around the body, including the face, to spasm. after an orgasm, a man'sbrain releases chemicals, such as prolactin, thatbring on tiredness. rob: that was a wonderfulpassionate night and, ah, yeah. we can't really show you whatwent on because it would be rated x. we're starting toconnect more, you know,

there was definitely morepassion and more emotion. brittany: if you canhave fun together, you have good sexual chemistr,you have a lot in common. it's hard to findthat in one package. couple 1: yeah i would say, imean an orgasm feels like, yeah, it's like pleasure butit's also stress release, it's a connection to her, it'slike relaxation coming over your whole body. male 1: oh i absolutelycan get a girl to orgasm.

male 2: no, i think, um, thatactually for me it almost gets me off to make the girl orgasm,you know i would rather her orgasm first obviously andmultiple times, if possible, but um, no, it's a senseof accomplishment, i think. male 3: yeah, the goal'sdefinitely her first and a couple of times before you. narrator: finding a compatiblesexual partner is vital for the survival of the human species. but for some people sex isnot about reproduction...

bryan: i would say 17 years oldwas definitely my first sexual encounter. it was with a guy. i remember being nervous andeverything - there was that awkwardness, like, is this whatyou're supposed to be doing? but i just sort of thatmentality where it's like, i'm gay, so what? i'm just sort of like fearlessabout it, i'm just like, you know what, justwhatever happens, happens. sex is supposedto be fun, right?

i figure everybody hassex, just, you know, we have different kinds of sex. dr linda: one of the interestingthings about differing sexualities is that in-- inrecent years we've found that there's at least some evidenceto suggest a physiological a biological hereditarybasis to this, but having said this wedon't know a lot about it, we don't know necessarily,you know, why it exists, and why it exists in the animalkingdom as well because it's not

just, not just with humans. narrator: homosexuality is foundthroughout the animal kingdom, having been observedin almost 1, 500 species ranging from giraffesto bottle nose dolphins. but the cause of homosexualityis still unknown, however some reports suggesteach older brother increases the odds of a man beinggay by 33%. bryan: once you knowthat you are gay, it then gets to the point whereyou're taking that to the next

step, you know, interactingwith it i guess you'd say; touching it, licking it, puttingit places - the whole shebang. narrator: around three and ahalf percent of american adults describe themselves aslesbian, gay or bisexual about 11 millionpeople in total. male 1: well i was with womenbefore, when i was younger, and after i was withwomen i was with men. gay man 1: it all startedat the age of seventeen, let's put it like that, i usedto date girls before that but at

the age of seventeen it was mylike my first funny experience with a guy. gay man 2: yeah, i lostmy virginity to a woman, not even a woman it was a highschool girl when i was thirteen, um, i had no idea that i wasgay or bi or anything until i was divorced the second time. male 1: people think that beinggay is a choice, it's not, it's when you're gay that'swhat you ultimately want. narrator: scientists are stilltrying to crack the puzzle

of why some people prefer theopposite sex, the same sex, or in the case of somepeople both sexes... aidan: sometimes i'm inthe mood to be straight, so i only get with girls. sometimes i'm in the mood tobe gay so i only get with guys. the grass is alwaysgreener on the other side, if you know what i mean? so, if i'm with a guyi wanna be with a girl, if i'm with a girl iwanna be with a guy?

narrator: like many bisexualsaiden has a higher sex drive than either straightor gay people. aidan: gay guys tend to thinki'm greedy so they don't really see me as relationship material;they see me more as a one-night stand. um, girls they take iteither one of two ways. one: they move away from theidea of having sex with me because i've hadsex with guys, um, and the fact that they thinkthat if i were to have be in

a relationship with them thenthey've got double the people to look out for if i wasto cheat on them or, um, someone wanted to tryand cheat with me. i do enjoy casual sexwith i suppose anyone. um, but in my experience if iwanted to go out tonight and have sex, it would be easier toget with a guy because i'm a lot more comfortable just randomlygoing out and getting with a guy than i am with a girl, and ithink i could find a guy quicker than i could find a girlto go and have sex with.

narrator: to satisfy hissexual urges aiden uses an app on a smartphone to locatepotential partners. aiden: i could in theoryprobably meet like 5 or 6 people and just be like, i'll meetyou there at this time or here at this time. i'm not saying that iwill, but you could. a guys talking to me now, andhe's asking me for pictures. i have some naughty pictures,but mainly they-- people ask for more pictures of your face justbecause you can put any profile

picture up but that doesn'tnecessarily mean that's you. narrator: it's not long beforeaiden tracks down somebody who wants to have sex. aiden: i didn't know it wasgonna definitely happen tonight, but i've obviously been talkingand i told him my day off was today and tomorrow so i'vejust been kind of hinting it i suppose, to him, and now he'skind of come back and said, well, i've got an hour, so i canget there in kind of ten minutes and then be done in be donein half an hour so i'll be

quite happy. um, i do have a condomin my back pocket, um, just in case he doesn't. narrator: meeting up witha stranger for casual sex is risky, but it's a riskthat aiden's willing to take. bisexual aiden is on hisway to have sex with a stranger he's arranged to meetusing a smartphone app. aiden: i guess what goes throughmy mind on the way to hook up is, um, a bit of nervousness;i've never met the guy before.

obviously the thrill of goingto actually meet someone, the excitement of that isa is a big factor which i enjoy. narrator: a sense of dangercan fuel sexual excitement. heightened levels of adrenalinecan double the heart rate; a rush of endorphins producea sense of exhilaration, and in the brain, instincttakes over this is not a time for thinking, but for action! aiden: definitelynervous at the moment. i want to make surei perform, firstly.

i gotta make sure that,because he's quite attractive, that he um that he enjoys it. it was a very good night. we both got what we wanted outof it and it was a good release for me, i really enjoyed it. i suppose i can relate it towhen i go to the gym and when you had a good workout,you pumped some iron, and it's the same kind offeeling that you get when you go for a hook up.

it's like you'vegot more energy, you've just released loadsand now you've got more and you just wanna like do it again. narrator: with increasedsexual activity, the greater the risk ofcontracting a sexually transmitted disease. there are at least 25 differentstd's that can be spread through vaginal, anal and oral sex. most can be prevented bywearing a condom, but others,

like herpes, can be spreadby skin to skin contact, and are less easy to avoid. the most common std ishuman papilloma virus, which infects over 50 percent of sexually active people at some point in their lives. and in the last decade thenumber of people with chlamydia has doubled it can beeasily cured with antibiotics, but it left untreated it canlead to sterility in women and men.

but for some stdsthere is no cure... bryan: the guy who infected me imet through a mutual friend and then, slowly but surely, wejust sort of had this connection going. then we eventually startedexploring ourselves sexually; we started a relationship,what can i say? it was actually probably myfirst love i'd say i had. we never used protection,even at the beginning of the relationship.

i was head over heels, i neverthought anything about it. and so, finally,i just started asking: like have you ever contractedanything from some people? well, it went silent. and he finally full outsaid, well i have hiv. i started getting sick, imean my whole body ached. this was like probably a weekand a half-two weeks after he told me. i like... being in thementality where i was like,

this can't happen to me.i'm really young... and everything, justi can't be this sick. i literally felt like iwanted to keel over and die. narrator: brian let the worldknow he was hiv positive. bryan: i'm sorry to tell youthis but the blood results that we took on you have come backand you have hiv...i've never felt so violated before,never, at all felt so violated. all sense of trust andeverything flew out the window. it was just like death becamea reality at that point.

he was very ruthless towardsme, very, just like, you know, you brought this uponyourself, you didn't ask, that's your problem,blah blah blah. that is a crime, i mean,if you're hiv positive, you're supposed tolet your partner know. i didn't know howto react to it. narrator: hiv attacksour immune system. if left untreated the viruswill destroy our body's ability to fight off infection; acondition known as aids.

to date over one millionamericans have contracted aids. but thanks to powerfulanti-viral drugs, it's no longer the certaindeath sentence it once was. doctor: when we first measuredyour virus level in march, it was 55,000 viruses percc of blood, and last month, as expected, after three monthsof your medication your virus levels dropped quite a bitand they're down to 93 copies. so, i anticipate that thismonth we shall see no virus, detectable by thismethod anyways.

bryan: i hope so, yeah. boyfriend: do you want toput some onions in there? bryan: go for it. do you wannado that while i get the zucchini going?boyfriend: yeah. narrator: forbrian, life goes on. he has a new partner, travis,who is also hiv positive. bryan: there's alwaysthat type of thing, like, how is my partner going torespond when they find out i'm hiv positive?

are they not gonna wannabe with me anymore? i mean, we dealt with thateven before we met each other, we just knew it wasgoing to be a non-issue. travis: right.we're gonna make it. narrator: in texas, tiffany andryan's two-year wait to have sex is almost over. tiffany: i'm excited;i'm really excited. there's already, you know,ryan can't find his tie but that's okay.

but everything else islike gorgeous i mean, the setup is beautiful; i walkedup and i just almost started crying. i couldn't have asked for betterweather, so, i'm really excited ryan: i'm pretty nervous;i don't really feel like i know what'sgoing on right now. um, things are kindof moving fast. narrator: waiting until they aremarried to have sex is a gamble, as sexual dissatisfaction is oneof the main reasons for divorce.

in just a few hours tiffanyand ryan will discover just how sexually compatiblethey really are... it's ryan andtiffany's wedding day. in just a few hours they'regoing to have sex for the first time. minister: we are gathered here,in the sight of god and these witnesses, you; the closestfriends and family of ryan and tiffany. friend: it is god that ordainedthe man and his wife to both be

naked and not ashamed,but that's later. minister: by thepower vested in me, by god and the greatstate of texas, i pronounce you man and wife.ryan you may kiss your bride. friend: well i'm prettysure she's really excited, i'm sure because we've talkedabout it over and over and over and over again. i mean she's got all the advicefrom everybody around her so she'll take it from there.she's ready!

the couple of the century,mr and mrs ryan butterfras! tiffany: with me, being avirgin there are some things that i just won't knowuntil we have sex, but i'm not you know stupid,everyone knows how sex works. friend: kiss for the camera! tiffany: more than being nervousi am very excited to have a deeper connection and, you know,it's a joy to be able to walk into this together andsay, hey, you know, now we can be completelyvulnerable together and

know each other to the fullest. i'm really excited, i'm ready. tiffany: the wedding night wasactually i would say better than i expected. we drove back to the hoteland everything went smoothly. ryan: yeah. no speedingtickets on the way to the hotel, she had to tell me toslow down several times. tiffany: it was actuallya really great experience, it was the best, i mean betterthan i could have asked for

a first experience with sex. ryan: it doesn't feel like to melike it's the same thing every time, it feels like it's awhole different new experience, every time. there's alwaysthat kind of like, sometimes i'll have an off day,other times i won't, you know, and vice versa so i don'tknow if that means... tiffany: thathasn't happened yet! ryan: well i appreciate that.tiffany: i'm really enjoying it!

ryan: i'm blushing now. narrator: sex may be fun, butlet's not forget it does have a serious purpose. carl and april are soonto have their first baby. carl: it feels goodto be out, doesn't it? april: yeah, it feels like ages. carl: it's just the fact thatin the next couple of weeks, you know, there's going tobe a little kid in my arms, you know what i mean?

it's just unbelievable,it really is. narrator: although around aquarter million babies are born every day, actually gettingsomebody pregnant is surprisingly tricky. of the hundreds of millionsof sperm that make it into the vagina almost allare killed instantly. the few thousand that do surviveare drawn by heat and chemicals to the fallopian tubes. the closer to the egg theyget, the faster the sperm swim.

it's a race against time. too slow and they'll either bedestroyed by the woman's immune system or run out of energy. only about a dozen sperm willmake it anywhere near the egg, of which one, the strongest,will penetrate it, creating a new life. april: the babymoves quite a lot, i get a few little kicksor or even hiccups actually. it's stopped now.

narrator: our sexual urges areso great that even when a female is pregnant, we stillwant to have intercourse. male 1: when my partner waspregnant she was definitely more sexually activethan... at... before. i believe her hormones justkicked in and she was like super-superall the time girl 1: i think youget really horny, um, while you're pregnant. no, from the hormonesi'm not joking,

i couldn't get enough of it,but now i'm like starting to slow down. now i'm like, you know,in the position and like, trying to like, find the anglesof like how... how we're going to do it and stuff like thatgets a little bit, you know, tricky and you gottajust be creative. girl 2: in my second trimester iwas the horniest i've ever been in my life, and then in thethird trimester you're just so huge and uncomfortable youreally just kind of get through

the day and kind of floatin a pool if you can. april: yeah, my sex drivedefinitely went up for a while. narrator: the surge of hormonesduring pregnancy can increase blood flow to the pelvic areaand enhance vaginal lubrication. intensifying the feelings ofsexual arousal and pleasure. but the changes in a woman'sbody shape can cause problems. carl: she was on top and sheslipped and i could feel the bump hit me in the stomach, itwas like proper freaked me out. and that's-- that's what iwas kinda thinking, you know,

'cause if the bump getssome impact, you know, it will have an effect on thebaby, you know what i mean, and it was just... april: you're limitedto what you can do, so it kind of takes thefun out of it a little bit. i'm gonna put this on here. narrator: studies suggest aman's sex drive drops around the birth of his child. this could be to stop himstraying and to promote bonding

with the new baby. carl: i can't wait. it's just the thought, just thethought of her just being there in my arms. i can't wait. narrator: the time has comefor april to give birth. carl: the contractions startedabout 4 o'clock this afternoon and, um, yeah it'sbeen a long day. so it's been going on forthe best part of 11 hours. april: a lot of things scare meyou know when it comes to what

i'm gonna be like as aparent if i'm honest. how is my child goingto turn out? you know? will i being doing this right? they are little things thati have already thought about. narrator: after 16 hours inlabour april gives birth. april: this isellie marie paddon. i feel amazing; just, wordscan't describe how happy i am right now. really, truly amazinghow gorgeous she is.

do you know what, it still sortof hasn't really sunk in yet that i'm a mum? narrator: our sex drive pushesus to spread our genes as wide as possible; it also playsa vital role in keeping us together. raising a family can unitea couple for a lifetime, but it may also cause thingsto change in the bedroom. maren: well, we metalmost nineteen years ago. it was at a very funtime in our lives,

and we did a lot of travellingand we did a lot of rock climbing and just had a lotof fun before we had a lot of responsibilities. kevin: i remember whenwe first started dating, we would get together onany day probably the first thing we'd take care of was sex andthen we'd do something else. maren: sex before wewould go rock climbing, sometimes at the climbing spot.kevin: right? it was definitely an everydayoccurrence for sure, you know,

and a lot of thetimes twice a day! narrator: when couples orgasm,it's thought a hormone called oxytocin is released, that'sbeen linked to promoting feelings of affection,contentment and attachment, which help couples bond. female: sex is the mostimportant part of a relationship, if you don't havesexual chemistry you don't have anything male: of course not, it's only,at that moment it's only you

and her; it's nobody else, so itcan't get any closer than that. male: sex got a lot better. we both didn't know whatwe were doing at first, and then like we like practisedeverything with each other and got real good so... female: yeah, so it's awesome. male 2: i think the sex getsbetter as you continue to have sex with that same person,so a one night stand is fun but it's not as good ashaving a committed relationship.

male: i think sex has changed alittle bit, its more intimate, i think it's more deeply tiedto how we're responding to each other on a relationshiplevel first. female: yeah, i would say oursex fluctuates in and out of different periods andtimes because, you know, life changes and when you'vebeen together for so long things, life fluctuates,what you gonna do? maren: i'm even more in lovewith kevin than when we got married, and our relationshiphas just gotten deeper

and richer... kevin: it evolvesevery day, you know? before i met maren i think thelongest relationship i'd had was less than a year. i couldn't imagine 19 years agothat this is where we'd be and this is how i'd feel about her. narrator: but the stress oflife can put the brakes on even the most active of sex lives. kevin: you know, since we've hadkids we've given up a lot of

our freedom. maren: so kai, what was yourfavorite part about this weekend kai: a lot of trampolines. kevin: since we first meti started my own business, which takes me away fromhome 80 hours of a week. we've had some very lowpoints in our relationship; there's been talk ofdivorce at points. maren: neither of us, i think,even are really wanting to have sex at nine oclock-nine-thirty at night,

because we're bothjust so tired. we're both just thinkingabout sleeping and not sex. narrator: it's been shown thatfor every month a couple are together a woman's sexualdesire decreases by about 1%, whereas men's sex driveremains largely the same. the reason for a couple'sdecline in passion may not lie in dropping levelsof sex hormones, but rather stress and simplyfinding the time to be sexy. maren and kevin turn toa sex therapist for help.

christine: hi.maren: hi. christine: come on in. you've been together formore than 20 years right? kevin and maren: nineteen. christine: yeah nineteen, youknow what makes each other tick. kevin: our daily sex clock iskind of off with each other, whereas when we firststarted dating it was, we were both 24-7,i think on that. christine: but that can beinterpreted as a lack of

interest for a specific partner,rather than a lack of general interest in sex. kevin: i may not be feelingit 100% all the time below the waist but it'salways in my head. but now it's like, you know, weboth have small windows i think where we... where ourgreatest desire is in. mine's usually earlyin the morning, hers is in the afternoon sothey don't always rhyme with each other.

maren: when there've beendips in kevin's sex drive, it's been very troubling to meand that has made me feel, like, maybe there-- you know, maybehe's not desiring me like he used to? i know that he probably hassatisfied himself in other ways in his office... kevin: just to get it done, iwould probably just rather take care of it myself. which i do. christine: so partof your homework,

what we're gonna recreate whenyou go away is we're gonna recreate a day when you had nochildren and when you had those moments of wanting tohave sex with each other. if you are willing to put theeffort into planning a sexual experience you stand to havea much better and more satisfying experience becauseall the planning is done and when it finally comesto having sex you don't have to think about that. maren: i think that soundsgreat. i'm in. pick me.

kevin: alright!christine: alrighty. have a good time!maren: thank you! bye, bye... narrator: to rescue their sexlife maren and kevin are going indulge theirfavourite fantasies, but will it be enough? on the advice ofa sex therapist, kevin and maren hope a weekendaway will help resurrect their sexual desire for each other.

kevin: it's been a longtime since we've, um, had a night away together. maren: we're very muchlooking forward to it, just not leaving our room! and there's a jacuzzi tub so wecould shower first and then have a jacuzzi and then i do rememberher talking about him giving me a massage, which ithink would be fabulous. kevin: just looking forward tothe evening; to get started. so, yeah we're gonna havea nice little weekend here.

do some of the things thatchristine asked us to do for, um, our homework assignment. maren: i want...stripper shoes. got my linda evan's wig. got my new christmas present. i think men sexually arevery visual, you know, it's very pleasing to the eye iknow for him and it's fun for me because i'm usuallyin jeans and sweats. it's nice to feel reallysexy and beautiful for him,

he definitely seemsto respond to that. kevin: beauty. maren: and after a long dayyou want to physically connect with your partner.here's to some alone time. yes! it was wonderful! kevin: yeah it was awesome. we had more sex than we had inthe last month i think in one night, so yeah, it was good.

in the beginning, we could notstand to not be naked together i think, you know! like walking in the doorand get naked and have sex and slowly over time you knowyou get more responsibilities and you have less time for sex. you eventually have to startscheduling it really, you know? maren: so i think it was kind ofa gradual thing that there was just less and less... kevin: our best bet is toplan more time by ourselves,

i think you know? maren: it's thattime factor, again. kevin: yeah maren: ...of getting the hoursat a time where we can just be narrator: in the sex labthe volunteers have finished the last test. initial results showed clearbiological signs of arousal between a numberof the subjects, especially betweenkatherine and chris.

data from the eye-trackingexperiment also showed a high level of visual attractionwhen they met face to face. dr linda wants to see how thevolunteers' conscious choice of a potential sexual partner,matches their subconscious bodily reactions. dr linda: guys, i wanna goaround all of you and i want you to answer just very simply, haveyou met anyone tonight that you think has potential in terms ofmaking a--making a connection? male 1: no.

male 2: there are a couple ofgirls who have caught my eye, maybe not in the long termbut in the short term. mali'll think about it.bitearly to tell but i dunno, dr linda: so you mightask them out on a date? male 3: i'm thinking about it... male 4: i think umm maybein the short term, you know, to get to know thema little better. at least one or two. dr linda: have therebeen any connections?

can you see yourselfseeing these guys again? let's, let's start over here girl 1: sure, but nobodyi would take seriously. girl 2: i think there areprobably, definitely be two, i think yeah. one i think is more personalityand one is personality and the looks. girl 3: one inparticular, very much so; physical attraction already,like that's something and i feel

like there's something thatclicked from the beginning and, um, and yeah maybeit's a bit, you know, the whole fantasy of that, butthere definitely is like an initial really wanting to getto know one and there's a lot of sparks that fly. narrator: with theexperiment over, the subjects could relaxand let natural sexual chemistry take over... dr linda: sex is vital.

even later on the ability tomaintain this sense of feeling needed and feeling connected. the physicality of sex is vitalso this idea that it is just there to ensure that we weprocreate, i think isn't enough, i think it's a much muchdeeper, much more integral part of our humanity.