How do some men stay in the marriage/relationship after being cheated on by their wife/gf?

I have seen so many posts lately saying how their wife/girlfriend cheated on them again and they’re finally planning to leave now, blah blah. I mean, how dfq do you stay with them if they cheated on you the first time? That mental picture of some other dude banging your wife/girlfriend in all kinds of positions, making love—that doesn’t go out of your head?? And you can still look at that person the same way as you used to??

Some men really need to check on themselves and have some fkin self-respect. If a woman cheats, you leave.