I never understood why people stay with someone that cheated on them.
Because it's not in male nature to leave a woman for cheating. Men are cucks by nature.
I'll just copy and paste what I said about this in another thread:
I've known a lot of guys who have gotten cheated on. Every single one of them STAYED. EVERY. SINGLE. ONE. Even the type of guys you'd NEVER suspect of being "cucks" stayed with their girlfriend. Even ones who got cheated on multiple times.
Marcus Aurelius the literal emperor of Rome, the most powerful man in the world at the time, had a wife who cheated on him with a gladiator. When he found out, he executed the gladiator and STAYED with his wife.
Men always stay.
Men are naturally cucks. Even with animals that "mate for life", if a male sees his mate with another male, he fights the other male and if he wins, he stays with her, and if he loses the other male gets her. Either way, he's not going to reject the female afterwards because she mated with another male. Males just aren't hardwired to do that.
This is one of the many reasons I never fell for the naturalistic fallacy. Nature is extremely cucked. Inceldom is natural (part of sexual selection). Hypergamy is natural. Male hyper-competitiveness is natural. Men's desire to provide for and protect women at all costs is natural. Men screwing over other men at every opportunity is natural. Nature is not your friend, nature is evil.
Also when it comes to this as a hypothetical, most guys would
say they wouldn't stay with a cheating girlfriend/wife, but in practice, almost all of them STAY. It's sort of like the hypothetical "If a much bigger and stronger man wanted to fight you, what would you do?". Most men would say something like "I'd kick his ass" with some giving some detailed "plan" on how they'd somehow do it. Or in the very least they'd say "I'd go down swinging". But in practice, the vast majority of guys bitch out in that situation.