I see both men and woman with clumps of hair from when they turnned 12. I't a hobbile talked mess, that looks like a grandma should be dragging afound. Why not shave it off, it looks cool and feels aewsom.

Perhaps because it is nomal to grow hair as you mature.

I just think hair is a natural thing, you get it when your body matures.

Believe it or not there is actually many reasons for it being there. One being the hair on your down below area as well as elsewhere captures pheremones, which are basically scents your body produces to attract the opposite sex and so with going completely bald everywhere you are most likely missing out on them! :p
Many people also believe it can be attractive, people like to style it in different ways, while some do not like it. Its just personal preference.

Hope this helped. :)