for me personally i have an oral fixation of always wanting to have something in or near my mouth ie. pencils suckers biting nails toothpick and the like. and it does relieve stress, especially when im studying or for exams. i started with cigars cuz tehy taste good adn transitioned to cigarettes. i dont smoke that much, just about a pack a month or so. but i smoke socially and like the way it calms me. i knwo the risks, i just dont really care.