A professor of mathematics sent a fax to his wife. It read: "Dear
Wife: You must realise that you are 54 years old, and I have certain |
needs which you are no longer able to satisfy. I am otherwise happy with |
you as wife, and I sincerely hope you will not be hurt or offended to
learn that by the time you receive this letter, I will be at the Grand |
Hotel with my 18-year-old teaching assistant. I'll be home before
midnight. 

-Your Husband" 

When he arrived at the hotel, there was a faxed letter waiting for him
that read as follows: "Dear Husband: You, too, are 54 years old, and
by the time you receive this letter, I will be at the Breakwater Hotel
with the 18- year-old pool boy. Being the brilliant mathematician that
you are, you can easily appreciate the fact that 18 goes into 54 a lot
more times than 54 goes into 18. Don't wait up."