Testosterone, what are you making these men do?
Maybe masculine aggression springs from testes. After all, injecting testosterone, at least to some extent, spikes levels of aggression in not only human males, but chimp and other monkey males too.
Maybe masculine aggression springs from testes. After all, injecting testosterone, at least to some extent, spikes levels of aggression in not only human males, but chimp and other monkey males too.