What are we talking about smoking here?

Unfortunately I've been smoking cigs for over a year now, but I'm not one of this inconsiderate bastards you all mentioned before. I never smoke in front of someone who doesn't like it. I always ask permission to smoke if I know someone might have a problem with. Also when I'm walking to class I will switch the hands my cig is in so the smoke doesn't go near the person I'm walking next to.

Marijuana is