"But Doctor," Bill replied, "I feel great. I haven't felt better in years. This just can't be true. Isn't there anything I can do?"
After a moment the doctor said, "Well, you might start going down the street to that new health spa and take a mud bath every day."
Excitedly Bill ask, "And that will cure me?"
"No", Replied the doctor, "But it will get you used to the dirt."