Some guys who cheat are doing it because they want to, not because they are unhappy. Some are accustomed to variety.
How much one cheats is often dependent on a person’s ability to replace mates. The easier it is to replace people, the less committed they will be to that relationship.
It’s why you see some men never leave their marriages, no matter how badly they are treated. They don’t think they will find a replacement.
It goes for the woman as well, but women have an easier time replacing their mates.
Sneaky use of the modifier "some."
You are, in fact, talking about the top 10% of men. The "top performers." The smooth-talking alphas.
No one here is defending them or their profligate behavior.
"Ordinary joes" would have to undertake herculean efforts to "cheat," undetected by their spouses, on a regular basis (or they have incredibly low standards and will resort to bedding the lowest forms of life lurking around on a tavern floor).
Regards,