Slight thread diversion. It occurred to me after submitting my last post that seeing a dentist with a great set of teeth might be a bit misleading.
There's the story of the rather bright young fellow who was on his way to a meeting with some dignitaries in a small town he'd never been to before. He hadn't had a chance to get a haircut in several weeks, and he was looking pretty shaggy, so he figured he'd better get a haircut before he went to his meeting.
There were two barbers in town. He peered through the front window of one barber shop and noticed that the barber himself had a pretty lousy haircut. So he went across the street and peered through the other barber shop window. This barber had a great haircut.
So he went back across the street to get a haircut from the barber who had the lousy haircut.