Don't smoke. It is an insanely stupid habit to start, which will kill you. But before it does that, it makes you disgusting looking, ruins your voice and makes your organs fail to function properly. Not to meniton that it's a turn off, what with the smell and yellowing of the teeth and fingers.
That's something which is not relevant to everyone, eventually something kills us- sorry for the negative tone, and in my case I'm smoking a single cigarette once in a few weeks, when I'm stressed before a big exam, for instance. the harm is minimal, it is like you want to eat mcDonalds once in awhile or drink some coke. They are very bad for the body, but nothing will happen if you do it seldom [;