An artist participating in an exhibition asked the gallery owner if there had been any interest in his paintings currently on display.
"I have good news and bad news," the owner replied.
"Give me the good news first," the artist said.
"The good news is that a gentleman inquired about your work and asked if its value would increase after your death. When I confirmed it would, he bought all 15 of your paintings."
"That's wonderful!" the artist exclaimed. "What could the bad news possibly be?"
With concern, the gallery owner replied, "The gentleman was your doctor."