Lots of different points of view flying around here, most of which reflect the choice you make when you smoke. Most smokers know it is bad for them, but choose to do it regardless. I am not going to get evangelical about quitting, just because I am trying to doesn’t mean that is going to be right for someone else. The facts however are that smokers DO die younger than non smokers (ceteris paribus), DO smell (although when you are smoking you cannot detect this), and it DOES negatively affect fitness. That said, it is also enjoyable, sociable and can be stress relieving.
Nobody has the right to judge other peoples decisions. Smokers should be able to exercise their legal right to smoke and non-smokers should rightly be protected from having to suffer the consequences of another’s choices.
Make your own mind up. I’m gonna give that book that a couple of people have suggested and see if it works. Right after my 7in Cohiba. (joke!)