Guys, Why do some men downgrade with the women they cheat on their girlfriend for?

Anonymous
I was on a site that I won't mention and there were a few attractive women who weren't fat or ugly who got cheated on with fat and ugly women. I can understand a fat or ugly female getting cheated on (I know that's harsh) it just makes more sense. I mean the women getting cheated on were a 8 or 9 and their replacements were a 4 or5. Help me understand why so many (not all men) do this?
Some men are very insecure dating attractive women
Some men feel that ugly or fat women won't leave or cheat on them
Some men downgrade to an unattractive woman to feel like he has control over her
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Guys, Why do some men downgrade with the women they cheat on their girlfriend for?
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