The study of sex has been going on for much longer than you might think. The problem is, the results aren't often widely publicized. But boy, are they interesting. Here, author Mary Roach delivers 10 amazing facts about orgasm, ranging from bizarre to just plain hilarious. If you want to read more, you should check out Roach's illuminating - and highly entertaining - book: "Bonk: The Curious Couple of Science and Sex."