Also, drug addicts are very unlikely to shame or make comments to non-drug addicts such as "Girl, you look really unhealthy, you should really shoot some more heroin"  Drug addicts do have analogous behaviors, but they're not quite the same because cultural attitudes towards drugs and food are not the same. For example, alcoholics will often try to get others around them to drink more. If they succeed, it helps them maintain the illusion that their drinking problem isn't "that bad." I doubt this happens as often with "heavier" drugs, though. Probably because it's silly to go around thinking "Well, everyone does as much heroin as I do, they just do it secretly. So, my heroin habit isn't too bad, really."