I also don’t understand why we have armpit hair. Or more accurately, I don’t understand scientists’ explanations for why we have armpit hair. It’s often surmised that it’s so that pheromones can collect there. Which makes sense from an evolutionary standpoint, as this would offer a reproductive advantage. The only thing is, it’s ludicrous. The smell that collects in your armpit is supposed to be attractive? Are you mad? It’s foul and repulsive. I think I read that the Egyptians were the first to shave their armpits because they found it reduced body odor. And it’s true. I dunno, I guess you can say armpit hair is for pheromones but is there any evidence to support that? It just seems to go against common sense.