A huge part of addiction is the rituals surrounding the use of the addicting stimuli, not just the immediate gratification of the stimuli. I recently watched a

A huge part of addiction is the rituals surrounding the use of the addicting stimuli, not just the immediate gratification of the stimuli. I recently watched a video of a decades long heroin addict describing his life. He said that he came home from rehab once and just the smell of heroin in his house was enough to make him nauseous and craving it.