Taking a frank look at the world of sex, the roadshow hits Stockport School near Manchester, where pupils try looking after a toddler for the day and get a lesson in how and why people come in so many different shapes and sizes. From hormones to genetics and breast size to penis length, the students get a frank and full frontal lesson in why we're made the way we are. The pupils go on a field trip with a difference and discover that bringing up baby can be hugely challenging as they experience the harsh realities of looking after a toddler for the day. Viewers also meet a person of restricted growth, 22-year-old Ivy Broadhead. She reveals how, when it comes to sex and height, size really doesn't matter. Plus the final set of results are released from the Great British Sex Survey and reveal how age affects what you like doing, with whom, where, and how often.

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The roadshow visits Bishops Gore School in Swansea, where pupils get a full-frontal lesson on the subject of attraction. Three couples - gay, straight and lesbian - reveal what it is that attracted them to each other in the first place. And the show reveals the science behind falling in love. The pupils are also taken out of school to a sexual health clinic to learn about contraception, while the parents are taught about the risky activity kids get up to with sending sexual texts - or sexts. And the Great British Sex Survey reveals the nation's favourite sexual position, and how many British men have caught crabs.

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A frank look at the world of sex. The roadshow visits Elliott school in Putney, south London, where pupils are taught about the three stages of pregnancy. The pupils learn the eye-watering truth about pregnancy from their mums. And learn about birth itself on a visit to a labour ward. Celebrated broadcaster and Rabbi, Lionel Blue, and orthodox Jew, Oli Kasin, reveal their very different experiences of growing up as gay men in the Jewish community. There is a report on kids and social networking sites. And more results from the Great British Sex Survey reveal how many people have had anal sex, and in which part of the country is dressing up to explore a sexual fantasy most popular.

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In another frank look at the world of sex, the Sex Survey reveals how many Brits have had a threesome, and in which part of the country people are most likely to have cheated on a partner. The roadshow travels to Angmering School in Sussex, where the pupils are taught everything they need to know about genetics. From penis size to height, and skin tone to breasts, the kids learn with the help of two naked families how genes determine where we get our size and shape from. They are taken out of school to be taught about breast health at a unique breast research centre, and also get to discover the highs and lows of first love from their parents and grandparents in embarrassing intimate conversations. The show meets Nicole and David, who have overcome Nicole's physical disabilities to enjoy great sex and, against the odds, conceive a child.

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In another frank look at the world of sex, the show visits York High to teach pupils about male puberty. And Anna Richardson shows some parents how easy it is to log into online chat rooms that feature shocking conversations and content. The kids at York High visit a fertility clinic to see how artificial insemination takes place and witness the moment life is created. More results from the series' sex survey reveals how regularly Brits have sex, which parts of the country are experiencing a dry spell... and how many people use handcuffs. And Jonny and Amelia, who both have impaired vision, talk about their lives and how being visually impaired needn't get in the way of a great sex life.

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Taking a frank look into the world of sex, the new series begins with the roadshow visiting Redborne School in Bedfordshire where pupils get to see real living STIs close-up. Anna Richardson talks sexting and porn with parents. She shows parents what their kids are really looking at online, and arms them with the facts they need to talk to their kids about such stuff. And the show meets 21-year-old David Smith, a paralympic athlete with cerebral palsy, and 24-year-old fiancé Kat Watkins, who suffers from brittle bone disease. The couple describe how - against all the odds - they have managed to achieve a fulfilling sex life.

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