And where does teens get the idea to smoke from? Is it from grandpa that coughs louder than a jet engine? Or is it the older cooler teens who got the idea from older teens, who got the....

You get the point.

I smoked as a teen because some of my friends did, they smoked because some of their friends did. And you don't have to look very far to find the 18-20 year olds who provided them.

Luckily, I never smoked much and mostly kept it to social smoking which made it very easy for me to quit once I grew up and developed some brain-cells that enjoyed co-operating with eachother.