‘My Dear Husband. I received your letter and thank you for your honesty about my being 54 years old. I would like to  take this opportunity to remind you that you  are also 54 years old. As you know,  I am a math teacher at our local  college. I would like to  inform you that while you read this, I will be at  the Marriot Hotel with Michael, one of my students.

He is young,  virile, and like your secretary, is 18 years  old As a successful  businessman who has an excellent knowledge  of Math, you will understand that although it may appear that we are in the  same situation, there is one mathematical difference: 18 goes into 54 a lot  more times than 54 goes into 18.’ Therefore, I will not be home until sometime tomorrow!!!.