Actually there is a possibility you can get the tobacco M virus stuff from smoking cigs with your plants and there is not really anything good as many have said already, the only thing that might be minutely ok for the plant is the co2 in the smoke, other than that it has nothing to do with plant karma or opinion it is biology/botany/horticultural fact that smoke in no way helps a plant, anyone whom says it doesn't hurt they're plant is wrong and they are lying to themselves and you, the plant of course will not wilt over and die do to some pot or cig smoke you won't even notice a diff but I assure you your plant is choking , but there is a reason we ventilate the air in our G rooms and such (clean air) not smoke filled air with all that crap from smoke in it. If you doubt what I say actually look it up, not in a pot forum, but in biology or horticulture(only they may react just like wonderblunders did, like are you f ing serious) or try growing a plant in a smoke filled room, dosent even need to be cig smoke and tell me how that turns out for ya. PEACE YO