Before the Evolution of Combat, when fighting in the aggressive stance , Strength experience was awarded per hit, where is the amount of damage dealt. Fighting using the controlled stance , however, awards Strength experience per hit, where is the amount of damage dealt. For example, a player who hits a 10 would receive 4 Strength experience when fighting in the aggressive stance and Strength experience when fighting in the controlled stance. The amount of experience received when fighting in the controlled stance may be calculated in the same way that experience awarded to the Constitution skill is calculated.
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.     
Women may find that other shorter acting esters are more manageable than longer acting such as testosterone enanthate. This is due to the fact that the fast acting esters can be controlled easier and that the dosing and administration of the compound can be quickly altered if negative side effects become overly burdensome. With longer acting esters these adjustments are much more difficult to make rapidly and side effects could become more pronounced and/or exaggerated. For this reason, females who use testosterone may want to at least begin with shorter acting esters if they experiment with testosterone.