The battle of the sexes can be explained at its deepest level, writes Meredith Small, as a war of different mating strategies. In her intriguing and provocative book about females and sex, Small concentrates on primates - the prosimians, monkeys, and apes, whose ancestry we share - to show how females have evolved to be highly sexual creatures. Using nonhuman female primates as a gauge, she describes the sexual and reproductive strategies of our nearest...