After his exam the doctor asked the elderly man: "You appear to
be in good health. Do you have any medical concerns you would
like to ask me about?"

"In fact, I do," said the old man. "After I have sex with my wife,
I am usually cold and chilly, and then, after I have sex with her
the second time, I am usually hot and sweaty."

Later, after examining the man's elderly wife, the doctor said:
"Everything appears to be fine. Do you have any medical concerns
that you would like to discuss with me?"

She replied that she had no questions or concerns.

The doctor then said to her: "Your husband had an unusual concern.
He claims that he is usually cold and chilly after having sex with you
the first time, and then hot and sweaty after the second time. Do
you know why?"