"Well, to tell the truth, Doc, yes," answered the patient. "You see, I seem to be getting forgetful. I'm never sure I can remember where I put the car, or whether I answered a letter, or where I'm going, or what it is I'm going to do once I get there -- if I get there. So, I really need your help. What can I do?"

The doctor mused for a moment, then answered in his kindest tone, "Pay me in advance."

- Submitted to Jokes4U by Jenna.