Ever since David was a child, he always had a fear of someone under his bed at night. So he used to go to sleep with a cricket bat under his pillow, so he went to a psychiatrist when he was older.
“I've got problems,” he said.  “Every time I go to bed I think there's somebody under it.  I'm scared.  I think I'm going crazy.”
“Just put yourself in my hands for one year" said the shrink.  "Come talk to me three times a week and we should be able to get rid of those fears.”
“How much do you charge?”
“Eighty dollars per visit,” replied the doctor.
“I'll sleep on it,” said David.
Six months later the doctor met him on the street. 
“Why didn't you come to see me about those fears you were having?” he asked.
“Well, eighty bucks a visit, three times a week for a year, is $12,480.00.  A bartender cured me for $10.00.  I was so happy to have saved all that money, that I went and put a deposit down on a brand new car.
“Is that so?”  said the shrink.  And, with a bit of an attitude, he asked  “And how, may I ask, did a bartender cure you?”
 
“He told me to cut the legs off the bed.  Ain't nobody under there now.”