CNN - Science is confirming what most women know: When given the choice for a mate, men go for good looks. And guys won't be surprised to learn that women are much choosier about partners than they are. Researchers led by Todd report in Tuesday's edition of Proceedings of the National Academy of Sciences that their study found humans were similar to most other mammals, "following Darwin's principle of choosy females and competitive males, even if humans say something different." Their study involved 26 men and 20 women in Munich, Germany.