Women better than men, eat healthier a survey of more than 14,000 people, conducted by the University of Minnesota, showed that women choose far healthier foods than men.

Thus, men who prefer to mate with blond women are unconsciously attempting to mate with younger (and hence, on average, healthier and more fecund) women.

Men prefer young women in part because they tend to be healthier than older women. One accurate indicator of health is physical attractiveness; another is hair.