They smoke because:

1: A family member smokes, and the only way to not get sick from the smell all the time, is to take it up yourself.

2: Trying to be cool, to fit in (nobody forces a smoke, you take it on yourself)

3: It relaxes the person.

4: Any number of given reasons.

I don't and will never smoke because for one thing, I can't afford spending that much on ciggs nor would I want to have the bad breath or teeth that come with it. I will only live once and I wouldn't want to take that away from myself. The idea is idiotic, in the first place, Why would you inhale poisonous fumes? The true stupidity of the human mind shows whenever someone lights one up.