If she isn't being affectionate to him then he can confront her and ask her what's causing her to act that way. Tahts how problems are solved.
Only a man of weak character would conclude that if she isn't affectionate towards her, it his ticket to go out and seek validation from another woman.
And as I said in the first answer of this thread, keeping up with such people is too much work 🙄. I personally would rather say goodbye and leave than try to always provide validation, affection and attention he doesn't act on his desperation and cheat on me. It just kills all the love for that person for me tbh.
I hope this answers all the other questions you've sent as well 🌚