Many strangers give Dr William Struthers a quizzical look when he tells them what he does for a living. Some women even turn their eyes away in embarrassment. The American biopsychologist studies sexual arousal, but specifically what parts of the human brain light up, and what chemicals are unleashed, when people watch porn. Neuroscience has not only confirmed the old adage that 90 per cent of sex is in the mind - the brain being the control switch for arousal and orgasm - but its research results have become ammunition in the combat zone that is the pornography debate. It's the pervasiveness of pornography today, says Struthers, that makes research like his especially relevant. Just 30 years ago, pornography was confined to seedy adult theatres, sex shops and copies of Penthouse tucked away behind newsagent counters. Back then, hardcore porn meant the graphic depiction of sexual intercourse in feature films and videos; softcore porn meant naked or topless pictures in Playboy.
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The history of erotic depictions includes paintings , sculpture , photographs , dramatic arts , music and writings that show scenes of a sexual nature throughout time. They have been created by nearly every civilization, ancient and modern. Early cultures often associated the sexual act with supernatural forces and thus their religion is intertwined with such depictions.
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