Why

I just took a little trip to the local convenience store. While sitting in the car, a young male (late teens, early 20's) stepped out of the car next to me. He proceeded to pull up his pants, then he pulled his shirt down and then he tugged his pants down a little. WHY?

I just can't imagine why people walk around with their clothing around their necks and ankles. Do they think it looks good. Well, it doesn't. It just looks horrid.