Hair placement on humans
Okay so i thought the places humans had body hair was originally (like with homo erectus and other early humans) was to keep people warm? so hair like, on legs and arms makes a lot of sense to me. so my question is: How come armpit hair stayed, and chest hair is less common?? is there another use for underarm hair? because that area of the body is warm enough i think, but exposed areas like the chest are way more likely to get cold. and is hair like eyebrows and just normal hair on your head purely visual?