I think it's publicisity, I'm only 15, but I think I see it more than anyone, how much it has changed, especially in the past 7 years or so.
When I first started secondary school (now in my last year) I would have never dreamt of swearing, drinking, fighting, having sex. And nowdays Most "children" of 12years old are more "mature" (sexually etc) Than I still am today.
Publicisity is by far the worst, whenever you watch tv, it's shown to them that its alright to have sex at 12years old, and to drink etc, and therefore DO NOT LIVE IN THE REAL WORLD....
You also see the people that children look upto, these skinny, drug taking, unreal people who also do not live in the real world!
Also, once you do reach school leaving age, teens see the actresses/footballers/models on tv, and that's what they want to be! And may end up on benefits, and become a burden to society..
Personally, there should be more empathsis on hard work and sex education... Since our year never got taught anything to do with sex ed.
Think I may have wundered off topic, but that's my opinion.