A drunk goes to the doctor complaining of tiredness and headaches. “I feel tired all the time,” he slurs. “My head hurts, I’ve got a sore arse, and I’m not sleeping. What is it, Doc?” The doctor examines him before standing back. “I can’t find anything wrong,” he says. “It must be the drinking.” “That’s ok,” replies the drunk. “I’ll come back when you sober up.”