What important function does our body hair play? hair(head), armpit hair, pubic hair, beard, mustache?

Question: Our nose hair filters the air we breath and all I know about our hair (head) is it helps keep our head warm and makes some of us look good. But some people are able to live without facial hair, armpit hair and pubic hair (for some women). Are these people giving up something important by shaving or losing these hair?

Answers:
Some people think that pheromones are emitted and hairy 'bits" secrete more sweat than other parts.

Other Answers:
To keep you busy shaving, cutting and taking care of them.

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