Reason I wouldn't bother cheating...you open up the other innocent person to potential fukkery.
Years ago, I knew someone who got approached to be side chick to a married man. The guy had been with his wife for over 20 years, I believe. She said nah but then asked him what about his wife.
Breh told her he had no intentions of ever leaving his wife or kids for a side piece. She asked him what if she decided one day that wasn't enough for her anymore and then just decided to go after his wife and kids anyway because she was angry.
He was

and

at the same time. I think that was the end of their interactions lol.
She was trying to get him to see that although
he might be the one to make the decision to cheat, doing so would open up his whole family to potential danger if a side chick ever decided to go off the rails.
Wouldn't be shyt he could do but live with it...and for what? Some ass?
I'm honestly surprised most people never think this way about their relationships - whether they are married or not.