One December evening, the dentist was finishing up a long day and it was already dark. But just before he locked the door, a new patient came in. Not wanting to pass up a potential client, he seated the man. "Now, what seems to be the problem?" the dentist asked the man.
The man said, "Doc, I must be hallucinating. At times, I think I'm a moth."
"But I'm not a psychiatrist; I'm a dentist. Why did you come in here?"
"The light was on."
-"BB"-
Yes, I suppose I could agree with you ... but then we'd both be wrong, wouldn't we?