+293 How underarm hair is an evolutionary necessity is beyond me. amirite?

by Anonymous 13 years ago

It acts kinda like a lubricant so your arms don't chafe when they swing. Or at least that's what I heard.

by Anonymous 13 years ago

You lose a ton of heat from your arm pit area - that's why arm pit hair was necessary historically. The same is also true with the hair on the top of your head.

by Anonymous 13 years ago

it's also because armpit hair catches pheromones given off through your sweat

by Anonymous 13 years ago