Peer pressure is the main enemy here, teenagers first try it with there friends - maybe they don't even want to - and then become addicted. Then, people who are already addicted to it, force other people to try it and so it goes on. Also teenagers get into the habit because they think that it will impress their friends if they know that they are what they think is 'hard core' and therefore take part in it.
Because many teens see other people doing it and they think it cool also they think it makes life better when it really does not also maybe they just need someone to talk too and no one will so they turn to drugs or maybe there having depression
Teens think drinking is a fun way to entertain themself and others and to loose all pressure and fears and problems by drinking and smoking its like entertainment to some or a stress reliever or just a way to not to get into trouble is by finding something that calms and relax there mind from thinking and pain Idk but i think its stupid to drink cause i rather know whats happening to me at a party and remember how cool the party was instead of. of getting drunk being stupid getting into stuff that i don't need to dill with and smoking i don't smoke cause i know smoking wont help me with my problems life is stressful and im still gonna have those problems still there and i figure theres other ways to do things then drinking and smoking plus its a waste of money that i could simple spend on something valuable