My brother is called Doctor (PhD) by his students, one of whom saw him in a parking lot in NYC. The attendant overheard the greeting and started.."You know, I have this pain." Bro: "I'm not that kind of doctor." "Oh. My teeth have been giving me a problem." Again: "I'm not that kind of doctor." "Really. Well my mind has been..." Once more: "I'm not that kind of doctor." "Well," the car jockey asked, "Then what the Hell kind of doctor are you?"