Well, I used to smoke a lot.  I quit several years ago, but I was doing it since I was in my teens.  I look around me and see people who smoked like I did, and it shows on their faces, early.  I don't know why I got away with it, genes maybe.  You could never tell that I ever smoked from my face.  I often wonder if my lungs look like Dorian Gray's picture.  Either way, often, you end up paying a big health price for smoking, even if you have quit.  You can still end up with lung cancer ten or twenty years after you gave it up.  But who knows.  I have known people who thought they were going to live to be a hundred, and they died.