A 54 year Mathmatician left a note for his wife. It read:
By the time you read this letter I will be at the Grand Hotel with my 18 year old secretary.
He then went to the hotel and there was a letter from his 54 year old wife waiting for him. The letter read:
By the time you read this letter I will be at the Breakwater Hotel with my handsome 18 year old stud. And being the Mathmatician that you are, you should be able to figure out that 18 will go into 54 many more times than 54 will go into 18.