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				 Math lesson 
 
			
			A Professor of Mathematics sent a fax to his wife.  It reads: 
 
 Dear Wife:
 You must realize that you are 54 years old and that I have certain needs that you are no longer able to satisfy.  I am otherwise happy with you as a wife and hope you will not be offended to learn that by the time you receive this, I will be at the Grand Hotel with my
 18 year-old teaching assistant.  I'll be home before midnight.
 Your Husband"
 
 When he arrives at the hotel there is a fax waiting for him on his bed.  It reads:
 
 "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.
 Your Wife.
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