The Naughty Bits (also Brit slang for genitalia) is billed as "the book that literary perverts have been waiting for." One of several recent Nerve.com tie-ins, it's a great idea and one needn't be especially literary or perverted to enjoy it. Murnighan's thoroughly good-natured, erudite introductions add to the bawdy fun.
I've always liked this cover. And I think being perverted helps a little bit.