Comment 11 by QuestioningKat

The question really seems to be whether people actually prefer mates that are more symmetrical because they actually have "superior" genetics or whether people prefer mates that are more symmetrical/attractive because it is a social advantage. Certainly, having children that are attractive gives them a social advantage in life. I really would like to see more conclusive evidence that less symmetrical/less attractive people are inferior genetically. Socially disadvantaged - yes, innately less competent, I doubt it. It seems that less attractive people need to work harder.

The reason people prefer symmetric people may be simply down to economy of brain design. It surely must be easier to 'code' the brain to like a simple symmetric design than to code it to like variants on unsymmetric designs. All the more so as the coding will itself be held in DNA which is itself symmetric and would thus itself code symmetry more easily.