girls love nail polish

why do a lot of girls wear nail polish? i think it is just a waste of money to have so many colors of nail polish. sure, i paint my nails, but i only do it like, once a year. the only kind of nail polish i have is the clear kind which makes your nail look like a nail-shaped crystal. once i tried it, and i liked how it looked. plus, it's only a clear one! i wonder how the other colors would look...