>>11913200It's a secondary sexual characteristic among some populations, meant to signal the overall fitness of the male to any females.
Beards are a major disadvantage in a fight. They also take up extra time and energy to grow and maintain properly.
It doesn't matter in modern society where even onions bois can safely wield a beard, but back when it was a kill or be killed society, having a beard meant you were alpha dawg. 'come pull my beard bro, and I'll end you, then I'll fuck all your females and kill your offspring'. It's a literal mane like in male lions.
