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.     
I also have a fatty liver. I have a fairly normal diet, with lots of fresh fruit & veg and drink about 2 litres of water a day. My alcohol intake is almost non existent and I am a non smoker. I am 157cm. and weigh 116kg (which has been quite rapid) – I have a moderate exercise regime. My Dr. tells me that I am high end stage of the disease. Since being treated for Breast Cancer in 2001, I now have a non functional thyroid gland, for which I am on medication and also on Cholesterol medication as well. Except for the weight gain I am keeping well. I am 55 yrs of age. My question is would I benefit from following the fatty liver diet/liver cleansing program? What other foods should I add/delete from my diet?.