us desires that do not change with sexual preference. Men and women tend to exhibit their expected sexual behavior regardless of their sexual preference. ConclusionThe two books examined in this paper, Martin Daly and Margo Wilson’s Homicide and David M. Buss’s The Evolution of Desire, suggest that human mating strategies have an evolutionary basis. The book written by Martin Daly and Margo Wilson supplies the theoretical groundwork and the book written by David M. Buss gives validity and empirical support for the theory. The two books make a strong scientific argument for evolutionary adaptations as the most crucial element to understanding human sexuality and desire. According to this argument, the key to understanding human sexuality lies in the evolutionary origin of our species. ...