The adolescence, will tend to do what they see, when they see their parents praying, they too will learn to pray, when they see their parents smoke, they would want to do that. It is one of the many reasons they know and become smokers. To the parents stop doing negative things in front of children, otherwise do positive things that are good for children.
Another reason they get into the zone when cigarettes are bad association. A good friend who will not let her go into a negative thing, just the opposite. For the moment we have a friend who smokes and is not good for us, let him slowly away. Not the least reason they smoke is the time to feel depression, loneliness, disappointment, and others who are psychologically disturbing them so they try to object and make it a habit of even a heavy smoker.
If you have never tasted a cigarette, then promise yourself never to taste it.