Why married man wants to cheat his wife? What's wrong with this kind of men without any moral?

I very curious why married man with kid also what's to cheat his wife? And I not speaking for some accidentally mistake cheating, he's on dating apps pretending to be single, to find a girl and cheat his wife on purpose!
Doesn't he love his wife or feeling sorry for her and child?
And he will put the other girl also in bad situation lying that he is single she will become mistress even without knowing it!
Forgot to mention that he lives in another city for work and he's wife in another but why not to bring the wife here?
Why married man wants to cheat his wife? What's wrong with this kind of men without any moral?
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