I remember reading that thick black pubic hair is super-sexy to the Japanese. Something to do with Japan's indecency laws (you can't show pubic hair). Different cultures have different norms. And armpit hair can either add to or subtract from a woman's attractiveness, in my opinion (makes a pretty girl more interesting and an ugly girl worse). Personally, I think shaving's nice because it feels better.

BTW, in my experience, if you shave your balls, women are more likely to put them in their mouths if that's your thing. I'm just sayin.