I'm a smoker, seriously don't start. You may think it reduces stress, but it is very stressful in itself. If I go without a ciggie for a while, I get.. Drum roll please.. STRESSED. Don't start man, I've tried to quit a few time, went without a ciggie for three weeks recently, and have never felt better, but I started again. :( If you want to reduce stress, buy a boxing bag, or smoke a cone once a week, haha.