Habit - a spontaneous action, beyond control, a ritual to prevent depression and fear.
American researchers Easter Wilder and Tony Turling Watt believe that half of teenagers whose parents smoke begin sexual activity at the age of 15, which is due to the emancipation of parents in the presence of children, so the rate of teenage pregnancy and abortion is high in America. A sociological study of 19 thousand children from 13 to 18 years found that 31% of parents are smokers. Drinking parents have children who smoke and drink.