Sex: An Unnatural History Episode Rating Graph

The 1960s was an era that heralded the birth of feminism, civil rights, free love and gay liberation - a sexual revolution that changed our attitudes towards sex and relationships forever.

It's hard to imagine that just over 50 years ago sex outside of marriage was a social taboo, homosexuality was illegal, masturbation was frowned upon, to view pornography you had to sneak into a seedy cinema in a back lane.

Does how we dress tell us what we're like in the bedroom? If you see someone wandering around in fetish gear it's safe to say they're doing so to attract potential mates of like minds. But what else can fashion tell us about sex? A lot, it seems.

Why do people cry out "oh God!" during sex? Is it because sex transcends our mind and bodies? Religion has been getting between the sheets since it became organised, but it was the sexual revolution of the '60s and birth control that brought matters to a head.

Sex existed long before the idea of love but somewhere along the annals of history the two became entwined. Many humans then started selecting their partners based on this emotion.

A three course meal that comes in a pill, jetpacks, time travel, space colonies, and the robot housemaid - these were just some of the predictions futurists made about what life would be like in 2011.