Why do I crave a cigarette every time I go to a bar?
Craving for a cigarette actually has two or three origins. One is the craving that is associated with chemistry: a chemical reminder that occurs every so often in a smoker where they start searching for their cigarette and their lighter because their brain says, "My nicotine levels are low." But when you go into an environment where you always do this ritually and where it calls for smoking socially - with other people or because of the activities that you engage in - you do that out of habit. So there is a ritual and a routine and an environmental cue to smoke, such as in a bar. But there's another reason in addition to chemistry and the environment, and that is that alcohol decreases your decision-making process about smoking. Alcohol is associated with a cigarette by habit, but alcohol itself and the way it affects the brain makes you want to have nicotine in association with that.