some will get "away" with it and some won't. My dad quit when he was in his 50's and lived to 78 when bladder cancer finally got him. They said his earlier smoking probably contributed to the the cancer that later claimed him. Then of course there are those who never smoked and still get cancer. I suppose you should consider yourself lucky if you have never been a user or an addict and if you have to consider yourself fortunate for each day you avoid the awful things.