Brains and balls are, in a sense, interchangeable: A recent scientific paper reveals that as sexual selection pressures increase in promiscuous bat species, males evolve larger testes and smaller brains. But in bat species where females remain faithful, males had comparatively smaller testes and larger brains. Conversely, male sexual behavior had absolutely no effect on either brain or testes size.
And Not Just For Bill Clinton and Gary Hart
And Not Just For Bill Clinton and Gary Hart
And Not Just For Bill Clinton and Gary Hart
Brains and balls are, in a sense, interchangeable: A recent scientific paper reveals that as sexual selection pressures increase in promiscuous bat species, males evolve larger testes and smaller brains. But in bat species where females remain faithful, males had comparatively smaller testes and larger brains. Conversely, male sexual behavior had absolutely no effect on either brain or testes size.