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.     
With all this in mind, we have provided a Clenbuterol cycle for both men and women, showing you how to adjust your doses in a continuous plan. Some may find the increases need to occur a week sooner or a week later than we've laid out based on individual response, but this will be a solid guide that shows you how to implement such use. Further, we have included a 16 week plan in for the male Clenbuterol cycle and a 12 week plan for women; however, while this is the maximum amount of time a Clenbuterol cycle should last some people may not need one that extends to this length of time. Finally, it's important to remember to include 1-2 weeks of Clen use at the end of the cycle that matches the starting dose; that portion is not included in the total 16 week plan.