Could it be a good thing that my boyfriend smokes a cigarette after sex?

No!!!: Smoking cigs is never a good thing. They are extremely dangerous and cause the most difficult of all the addictions. The tobacco companies need to turn 3000 children per day into new addicts just to replace the victims they lose to cigarette-related diseases daily. Tell your boyfriend how much you love kissing him when his mouth doesn't smell like tobacco, and praise any efforts he makes to quit.