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.     
Clobetasol propionate at concentrations up to % did not increase the rate of formation of ultra violet light-induced skin tumors when topically applied to hairless mice 5 days per week for a period of 40 weeks.
Clobetasol propionate was negative in the in vitro mammalian chromosomal aberration test and in the in vivo mammalian erythrocyte micronucleus test
The effect of subcutaneously administered clobetasol propionate on fertility and general reproductive toxicity was studied in rats at doses of 0, , 25, and 50 μg/kg/day. Males were treated beginning 70 days before mating and females beginning 15 days before mating through day 7 of gestation. A dosage level of less than μg/kg/day clobetasol propionate was considered to be the no-observed-effect-level (NOEL) for paternal and maternal general toxicity based on decreased weight gain and for male reproductive toxicity based on increased weights of the seminal vesicles with fluid. The female reproductive NOEL was μg/kg/day (ratio of animal dose to proposed human dose of on a mg/m 2 /day basis) based on reduction in the numbers of estrous cycles during the pre-cohabitation period and an increase in the number of nonviable embryos at higher doses.
Fluticasone propionate is a synthetic (man-made) corticosteroid that is used on the skin (topically). The naturally-occurring corticosteroid is cortisol or hydrocortisone produced by the adrenal gland. Corticosteroids have potent anti-inflammatory actions and also suppress the immune response. Similar drugs include betamethasone dipropionate (Diprolene), clobetasol propionate (Temovate), halobetasol propionate (Ultravate), betamethasone dipropionate (Diprosone), desoximetasone (Topicort), halcinonide (Halog), amcinonide (Cyclocort), triamcinolone acetonide (Kenalog), fluocinolone acetonide (Synalar), hydrocortisone butyrate (Locoid), hydrocortisone valerate (Westcort), and mometasone furoate (Elocon). The FDA approved topical fluticasone propionate in December, 1990.