Here is a quick example of simple mature relationship math
My Dear 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 18 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,
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 18 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 - 18 goes into 57 a lot more times than 57 goes into 18.
Therefore, I will not be home until sometime tomorrow.