Do you smoke cigarettes and if so, why?

I'm curious about who in our age group smokes cigarettes and their reasoning for doing so. Now, I smoke marijuana, but only on weekends, and maybe on a weekday evening if I have a bad day at work. I've never smoked cigarettes because I just seeing it as inhaling literal poison into your body, but that's just me.

If you smoke, what are your reasons for smoking? No judgements or anything, I'm just curious.