...Why is it, that from the moment you enter medical school to the moment you retire, that the only disorder you will ever diagnosis with a physics book - is obesity? This is biology folks, it's endocrinology, it's physiology - physics has nothing to do with it. The law of thermodynamics is always true, [but] the energy balance equation is irrelevant...

in human males, testosterone appears to promote behavior intended to dominate other people. This behavior can be expressed aggressively, even violently, as well as nonaggressively. Testosterone levels, even a single baseline measurement, correlate well with dominance behavior, that is, testosterone not only affects dominance behavior but also responds to it.