The problem is: the overwhelming compulsion to do something because you know you shouldn't do it. I'm reading a biography of Edgar Allan Poe and he complains of this compulsion having ruled his life, particularly in the case of his binge drinking. Derren Brown also exploits this compulsion in one of his segments in which he induces a girl to electrocute a kitten simply by giving her the task of not electrocuting the kitten. (He puts her in a room with a kitten in a metal cage, an on button, and tells her her job is to stay there alone for five minutes without pressing the button.) I'm thinking this must be a part of OCD or an anxiety disorder, but it might be something else, and I'm too lazy to hunt for it just now.