Strange that,I must admit!
Although I do have a bit of body hair on my back,which is slightly annoying.I also have quite hairy armpits.But,I do snip a bit off when it grows too much.
I must have a high level of testosterone or something to make my hairs grow so quickly.I have to have a shave every morning,as my stubble grows quick too.
I have just started having a wet shave.I used to use an electric razor,but I find a wet shave seems to give me a much more smoother skin.
I guess according to evolution we would have to ask why the hair vanished over time, from those areas. Hmm. Perhaps feet became cleaner as we were walking on them and hair got in the way? Skin got tougher instead. We need to ask Darwin!
well as far as i can recollect monkeys and apes don't have hair on the soles of their feet or hands either, which makes me think it has to do with grip and slippage.
It probably has something to do with the fact that one of the purposes of hair is to keep the body warm. The outer areas of the arm are more exposed to the elements, and stand up, trapping warm air, when the temperature drops. Underarm hair is probably there to prevent sweat from running down the body, just as eyebrows stop it from running from our foreheads into our eyes.