From the time they hit middle school, they start moving away from home. They are not doing anything wrong; it's just the way they are made. They are becoming independent, and they begin redefining themselves through the eyes other people who are not in their immediate family. The older they get, the more important it is to have other voices in their lies saying the same things but in a different way. 
Reggie Joiner, The Think Orange: Imagine the Impact When Church and Family Collide...
parenting, teens