You try beer, booze or pot, maybe cocaine, whatever. It feels good. Youprogress from doing it only at parties or with lovers and/or friends.Now you occasionally have a drink and light up when you are alone. Usebecomes customary: maybe a drink or two before dinner, TGIF, Saturdaynight becomes party night … so do the other nights too … and you nolonger are someone who drinks at meals or social celebrations. Now youare someone who drinks, period.