From the ArcaMax Publishing, Jokes Newsletter:
http://www.arcamax.com/news/jokes/s-347305-940103
Shakey went to a psychiatrist. "Doc," he said, "I've got trouble.
Every time I get into bed, I think there's somebody under it. I get
under the bed, I think there's somebody on top of it. Top, under, top,
under. You gotta help me, I'm going crazy!"
"Just put yourself in my hands for two years," said the shrink. "Come
to me three times a week, and I'll cure your fears."
"How much do you charge?"
"A hundred dollars per visit."
"I'll sleep on it," said Shakey.
Six months later the doctor met Shakey on the street. "Why didn't you
ever come to see me again?" asked the psychiatrist.
"For a hundred buck's a visit? A bartender cured me for ten dollars."
"Is that so? How?"
"He told me to cut the legs off the bed!"