0
0
0
s2sdefault

Smoking has several appeals. First, tobacco naturally contains nicotine, an insecticide, which raises alertness, speeds reaction times, and stimulates the release of neurotransmitters such as dopamine, which are associated with pleasure. Second, smoking may provide opportunities to flout authority and fit in with peer groups. Third, once someone has started smoking, attempts to stop may precipitate withdrawal symptoms such as headaches, nausea, anxiety and weight gain.