In most cases (I think) it's not a real disorder, but just the result of a generation that's spoiled rotten. When you've been told you're oh so special and brilliant from your toddler years, that mentality is hard to get out of. The same mentality produces a lot of fatties. Makes them think they're entitled to constant attention, including sexual attention, special rights and, of course, a neverending stream of beetus food.