After an examination, the doctor said to his patient: '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 my wife and I have sex, I'm
usually cold and chilly; and then, after I have sex with her the second
time, I'm usually hot and sweaty."

When the doctor examined his wife a short time later he said,
'Everything appears to be fine. Are there any medical concerns that you
would like to discuss with me?'

The lady replied that she had no questions or concerns.

The doctor then said to her: 'Your husband mentioned an unusual problem.
He claimed that he was usually cold and chilly after having sex with you
the first time; and then hot and sweaty after the second time. Do you
have any idea about why?'

"Oh, that crazy old coot'' she replied. "That's because the first time
is usually in June, and the second time is in December."