ctiveness. This is the waist hip-ratio in females. There is a curvilinear relationship to attractiveness with a maximum of attractiveness at 0.72. Surprisingly this maximum is related to many health features in females. Moreover there is a direct link to fertility: females with an optimal WHR become more often and faster pregnant through artificial insemination. But why would cognitive averaging have evolved? Evolutionary biology holds that in any given population, extreme characteristics tend to fall away in favor of average ones. Birds with unusually long or short wings die more often in storms. Human babies who are born larger or smaller than average are less likely to survive. The ability to from an average-mate template would convey a singular survival strategy. Inclination towards the average is called " Koinophilia" Theories of Prototype Processing: Pro. If our brain uses prototypes - averageness might well be coupled with being "prototypical". Thus there might be a better fit of the stimulus onto the prototypical template. As a result, prototypes are recognized faster and better and thus might create higher nervous excitation. This fact could be the reason, that average is preferred. Our brain could accept more willingly better fitting stimuli. Andres Muller has called this process "neuroaesthetics". Donald Symons proposed that males should avoid mating with females who are at the extremes of a population, because these females may carry disadvantageous genes. Prototypes do portray some genetic information. With respect to features with additive genetic variance, homozygous individuals are over-represented at the extreme tails of the distributions. In contrast, heterozygous individuals are over-represented at the middle of such distributions. In contrast to this male gender prototypes are not average. We have seen that big single traits are attracti...
