It sounds like you're assuming evolutionary pressure as a mechanism of change, is that correct? Have you considered that the body may produce different hormone

It sounds like you're assuming evolutionary pressure as a mechanism of change, is that correct? Have you considered that the body may produce different hormone levels as a result of our mental state? For example, when startled, the body produces a hormone called adrenaline. We know with certainty that mental state is responsible for certain types of hormone production. I honestly do not know if there might be a link between testosterone production specifically and mental state, but I took this to be the question that the above poster was asking.