The Prognosis
The man told his doctor that he wasn't able to do all the things around the house that he used to do. When the examination was complete, he said, "Now, Doc, I can take it. Tell me in plain English what is wrong with me."
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"Well, in plain English," the doctor replied, "you're just lazy."
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"Okay," said the man. "Now give me the medical term so I can tell my wife."
http://www.jokes.com/funny/health/the-prognosis