Hair or no hair?
Hair has its purposes. Protects us from particles, sweat, keep us warm, etc. But most hair is not necessary anymore since we decided to get some skins and fabrics covering us.
Hair, like many other things, is now a choice, a fashion statement, a hygiene matter for the person who likes to take care of themselves.
Sure you want to feel fresh, clean, sexy and desirable.
Hairy backs, monkey legs, out of control pubic areas, sweaty butt cracks, grampa's eyebrows or beard till your eyeballs are just a no, no nowadays!
Or, if a maybe, make it nice! Groom it like you do your scalp hair! ;)