This week, ropey new comedy ‘Sex Tape’ casts Cameron Diaz and Jason Segel as a married couple trying to track down the candid flick they shot together. Now, maybe you find the idea of Hollywood plastics Segel and Diaz engaged in a bit of suburban nookie a real turn-on, but we’d imagine you’re in a minority. But it got us thinking – how many times have we been subjected to explicit scenes that we never asked for? And what are the most egregious examples? Here, for your skin-crawling entertainment, are the 20 movie sex scenes we really could have lived without.