One indulgence leads to another: The more you drink, the more likely you are to light up, says a new study in the American Journal of Health Behavior.
And it doesn't just apply to perpetual puffers—researchers found social smokers were also more likely to crave a cigarette after a few too many rounds.
The reason: “Both alcohol and nicotine are addictive and stimulate the part of your brain that acts on rewards,” explains Marina Picciotto, Ph.D, professor of psychiatry at Yale University, who studies nicotine's affect on the brain. “Taking one is like priming the pump, and it makes you crave the other.”