Imagine a tribal who drinks a stinking toxic liquid, goes crazy, shouts insensibly, topples into dirt, falls unconscious, returns to consciousness after several hours with severe headache and stomach upset and vomits helplessly in agony.
“How horrible,” we will exclaim, “What kind of people do such things? Why?” But isn’t that what an extra-terrestrial being will exclaim on seeing one of the most common – and most perverse – pleasures that we moderns delight in? Yes, we are talking about dri


