You assume that people, both men and women, do not change and remain faithful after marriage.
Marriage is an overrated thing, infused with man-made beliefs and values e.g. basic building block of society, holy matrimony, expression of true love, something that is intrinsically good etc.
If you remove all that additional layers of bullshit, marriage is nothing more than a business transaction between a man and a woman, and an alliance between two families. That is all.
Brilliant!!! I hope you stay intelligent and brilliant - always!!! Merry Christmas Sir !!!