Heidi Schmidt wrote:- I wax my armpits. No hair there helps A LOT. I notice a difference when the hair is growing back.
Very true. I mentioned above that I trim mine every few weeks, and while not as complete a job as shaving, even that helps a lot. I also find it more comfortable, once you're used to it at least.
One should consider why armpit hair exists in the first place. Humans stand apart from other primates as "the naked ape," emphasis on "naked," though this of course varies in degree from race to race and individual to individual. But even the most smooth-skinned Japanese still has three areas guaranteed to sport dense growth of hair: on top of their heads, under their armpits, and on their crotch. Why should this be, evolutionarily speaking?
Well, hair on your head is easy to figure out: it protects your scalp and neck from the sun. But what about the other two? What useful purpose is there to pit hair and pubic hair, so much so that it overrode whatever positive attribute there was to shedding fur (and actually I couldn't guess what that was) which led natural selection to breed bare-skinned hominids in the first place?
It was the need to maintain pheromonal communication between individuals. Pubic hair and armpit hair act as wicks to better disperse our personal scents, located conveniently adjacent to some of our major glands. I suppose the fact that this hair also serves to harbor stink generating bacteria is immaterial to natural selection. It certainly didn't bother our primitive ancestors enough to keep them from mating.
Unfortunately, this is inconsistent with the more delicate sensibilities of modern Western civilization. Personally I'm all for pheromonal communication, but I'd really just as soon not stink, thank you very much. So shave it all, I say! Or keep it trimmed if shaving sounds too maintenance intensive and/or violates the aesthetic of your preferred gender identity.