Cosmo's Boob Bible: 20 Surprising Facts About Your Set

For all the attention breasts get from men (and the media), you probably know surprisingly little about yours. Maybe it's because you've had your set for years now, and you view them simply as a bodacious accessory. Or your twin peaks seem so low-maintenance, you've never had a reason to give them much thought. Well, hold on to your bra straps -- truth is, your boobs are a hell of a lot more than just two bumps that keep your bikini top in place. To give you a better understanding, we've put together 20 of the most fascinating facts about your bosom buddies.