This is simply a popular trend of our generation and, along with the henna tattoos and bright hair coloring, it will soon fade. It can be helpful for you to remember when you might have been in a similar situation as a teen. It's this group's ways of being outrageous and different. Trends today are no different than those of the 50s and 60s, except that now we are running out of new things to do.
Every generation is forced to do something a little more extreme.
In past years, teens have colored, cut and grown their hair out. They have dyed, ripped, and even removed their clothing. It has to be bold, shocking, and maybe even somewhat disturbing. Piercing just seems to fit the description. Teens need to express themselves.