I am a never-smoker myself and in Romania so many people smoke that at least once a day when I go outside I see a person smoking and hence smelling the tabbaco smell. I know these smokers are addicted to nicotine and that it's not really their wish to smoke but they find it very hard to quit and if they don't smoke for a few hours their body will start to demand for the nicotine it wants everyday. How do smokers manage to sleep during the night? If the smokers' bodies rely on nicotine to work normally on what does the bodies of never smokers rely to function?