Big Book of Butts (Adult Picture Book: Anaconda Edition)

A protruding posterior is considered attractive by guys for a variety of reasons. Primarily, evolution programmed men to prefer women with wide child-rearing hips, and a big butt represents this ideal mating quality. Plumpness also signifies youthfulness, which is a trait that males prefer. Finally, everyone likes something to hold onto during sex, and a little spanking never hurt either.