Larger breasts were therefore a better basis to judge age, and therefore reproductive value, upon. A recent study of Polish women found that those with large breasts and a small waist were the most fertile, based on the level of their reproductive hormones.
It may be that men therefore prefer women with large breasts for the same reason they have a preference for women with small waists.
Men then evolved the predisposition to prefer blonde women.
This can explain the “blondes are dumb” stereotype, as the average age of light blondes in the ancestral environment would have been a teenager, where for brunettes in the same environment would have been much older, perhaps 35.
Blue Eyes: The only available explanation for the universal liking for blue eyes was offered in 2002.
Much of the recent literature has been driven by debates on the power of the Body Mass Index (BMI) over Waist-to-Hip (WHR) ratios to attempt to determine the universality of male mate preferences (Dixson, Sagata, Linklater & Dixson, 2010).The debate has been won by the BMI school who argue from the data that it is the best and first-past-the-post choice factor when men look at women. Youth: Young women are preferred by men as they have greater reproductive value than older women.But there are a long list of other factors that play a part. This relates to the expected number of children that she is yet to have in her reproductive career.Blonde Hair: Blonde hair is another indicator of a woman’s age and thus reproductive value.Blonde hair changes dramatically with age, darkening after a blonde has her first child, with her oestrogen levels reducing, and more so with the birth of her next children.During illness the body takes nutrients from non-vital parts of the body (the hair) and re-directs them to areas necessary for survival. The rate of hair growth is very slow (approximately 6 inches per year), and therefore one can judge an individual’s past health from the quality of hair of differing lengths.If you experience illness, the section of hair growing in this time will be of lesser appearance than when you are well.Therefore, it is easiest to judge whether another is attracted to you if they have blue eyes.This helps explain the liking for blue eyes in both sexes, as it is equally important for a woman to judge whether a male is attracted to her.Interestingly, the ratio fluctuates during the menstrual cycle, being at its lowest during ovulation, when a woman is most fertile.Men are unconsciously looking out for healthier and more fertile women.