Mary Roach's TED Talk, "10 things you didn't know about orgasm," will have you scratching your, um, head, in amazement as you learn the particulars of pig-wanking, the delicate matter of explaining foreplay to royalty, and the business of measuring the human penis's muzzle-velocity.
Mary Roach: 10 things you didn't know about orgasm
(via MeFi)