I’ve always found it fascinating that people don’t perceive socially sanctioned drugs as drugs at all. Saying “drugs and alcohol” to me is like saying “sandwiches and hamburgers”. A person can drink a cup of coffee in the morning, smoke a cigarette on their lunch break, and drink a couple glasses of wine in the evening, and the only thing that keeps them from being called a “drug addict” is that these particular drug…
David E.H. Jones pointed out that the socially sanctioned drugs have something in common: they all taste bad. Or at least, they have a taste that is unappealing to children, and then must be acquired by special effort. Coffee, tea, tobacco, alcohol: all taste pretty awful to a ten-year-old.
The simplest hypothesis I can think of that explains this is that most things taste bad. We usually only eat the exceptions--the things that taste good. But we'll eat something that tastes bad if it gets us high.