God has a plan and a purpose for all of us. The way we show what we believe is through our actions. As teenagers it can be hard to live a Christian life because we want to fit in. We want to be accepted by our peers. So we mimic our friends' actions and dress.
Teenagers can be cruel.
If you don't meet their approval, you are ridiculed, and you become the target of hateful jokes and comments. Look at the situation when it is taken to extreme. The students at Columbine High who brought guns to school and shot several of the students were the outcast from society. They dressed differently and they acted strange. They were not the norms so they were used as objects of scorn among their peers.