A distraught man went to a psychiatrist and exclaimed, "Doctor, I believe that I am possessed by an evil spirit." After talking to the patient at some length, the psychiatrist said, "You do appear to have a problem. I'd like to see you again next Wednesday."
After a second session of psychotherapy, the psychiatrist pronounced his patient completely cured.
For the next nine months, the psychiatrist sent the man a monthly statement for his professional services, but the man wouldn't pay and refused to acknowledge the debt. Finally, the psychiatrist took the man to court and had him repossessed.