Want to know how Demi Moore manages to looks so youthful, keep Ashton in check, and maintain downright jovial relations with her ex Bruce Willis? Leeches! Okay, so we actually don't know that the leeches do anything for those latter two things, but, as she explained on the Late Show With David Letterman last night, Demi recently leeches attached to the non-hairy parts of her body (including her belly button) to "purify," her blood. Clip above.