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The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.     
Medicines are sometimes prescribed for conditions that are not mentioned in patient information leaflets. Do not use CLOBEX® Shampoo (clobetasol propionate shampoo) for a condition for which it was not prescribed. Do not give CLOBEX® Shampoo (clobetasol propionate shampoo) to other people, even if they have the same symptoms you have. It may harm them. This leaflet summarizes the most important information about CLOBEX® Shampoo (clobetasol propionate shampoo) . If you would like more information, talk with your doctor. You can ask your pharmacist or doctor for information about CLOBEX® Shampoo (clobetasol propionate shampoo) that is written for health professionals.