Because teens are teens that love to imitate and be persuaded easily. A group of friends, it is a highly influential group. Because adolescents need to accept, from a group of friends in the society.
Because teens ages who like to imitate, and have been a bit easier. Friends is a group of highly influential. The teenager wants recognition from peers in the society.
Because teenagers are young like to imitate and were taken easily. A group of friends, so a great influence. Because teenagers want to accept from a group of friends in the society.