I don’t know the origins of this joke, or who first told it, but a friend sent it to me via email and I couldn’t resist sharing it.
My Dear Wife,
You will surely understand that I have certain needs that you, being fifty-four years old, can no longer satisfy. I am very happy with you and I value you as a good wife. Therefore, after reading this letter, I hope that you will not wrongly interpret the fact that I will be spending the evening with my eighteen-year-old secretary at the Comfort Inn Hotel. Please don’t be upset; I shall be home before midnight.
When the man came home late that night, he found the following letter on the dining room table:
My Dear Husband,
I received your letter and thank you for your honesty about my being fifty-four years old. I would like to take this opportunity to remind you that you are also fifty-four 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 Hotel Fiesta with Michael, one of my students, who is also the assistant tennis coach. He is young, virile, and like your secretary, is eighteen years old.
As a successful businessman who has an excellent knowledge of math, you will understand that we are in the same situation, although with one small difference: eighteen goes into fifty-four a lot more times than fifty-four goes into eighteen. Therefore, I will not be home until sometime tomorrow.