...is, without a doubt, Mary Roach's BONK: The Curious Coupling of Science and Sex. I probably don't need to go into too much detail about it here since Mary has her own page on Red Room, and since it's getting wonderful reviews just about everywhere--check out the New York TImes, the SF Chronicle, Salon, etc. I won't be getting my hands on it until tonight (when I plan on snagging a copy at one of her readings), so I'll post more on it later.