10 things you didn't know about orgasm This is a link to a video (appx 17 minutes) of a talk given by Mary Roach, discussing strange discoveries she made while she researched her book about sex, Bonk. (My boyfriend swears by her books, says she's so witty and engaging she can make any topic interesting. She's also got a book about death called Stiff and one about the supernatural called Spook.)
As the website itself warns, this talk is aimed at adults. Viewer discretion advised.