there are prople who don't want one but actually have almost a hundred on their face. Most people consider them to be crazy but why do you think that these people would do such a thing?

In my opinion they do it as a way to express themselves. There are some people that do it to tell their parents something they can not do by word. Some people get piercings to be different from others, or just to show the world they are rebels. These people just express themselves by getting pierced, piercings are just part of their lives, and they just do it because they like and want to.