Dancers smoke for the same reason models do, to stay skinny. Nicotine prolongs the need for food by filling you up and suppressing hunger. I also think they smoke for the relaxing sensation it gives on hectic, stressful days, especially during long and hard practices. They're to many pressures on girls professionally to be skinny and have "the perfect body" and that is the main reason that drives girls to smoke. I do not smoke, just to clarify.