An uproarious and authoritative natural history in the form of letters to and answers from the preeminent sexpert in all creation, this bestselling guidebook to sex reveals, for example, when necrophilia is acceptable, how to have a virgin birth, and when to eat your lover. It also advises on more mundane matters-such as male pregnancy and the joys of a detachable penis. At once entertaining and wise, Dr. Tatiana (a.k.a. Olivia Judson) fuses natural history with advice to the lovelorn, blends wit and rigor, and reassures her anxious correspondents that although the acts they describe might sound appalling and unnatural, they are all perfectly normal-so long as you are not a human. In the process, she explains the science behind it all, from Darwin's theory of sexual selection to why sexual reproduction exists at all. By applying human standards to the natural world, in the end she reveals the wonders of both.