A study from the University of Western Australia and the University of Zurich during which the testicles of more than 100 different male primates have been studied claims that all male primates have the same evolutionary problem with their genitals.

The study says that males can either be “well endowed” and have large balls, or are instead “well-adorned” with hair. Researchers concluded that it’s “hard to be both” of these things as it takes too much energy to do.

Although the study focuses on animals, humans have very similar evolutionary patterns and many claim that the same can be applied to human males. As a bearded man, I can confirm that this is most likely true.