men get off to the feeling of cheating/being cheated on, but like why ?

not kink shaming, just asking why it's so prevalent in like porn or like media in general ? When I used to read 'porn mangas' and just browse the popular section, I would only see stuff like "lady cheated on her husband for her ugly boss" or "girl cheats on her bf with a jock" and when the husband appeared, his peepee was always tied up, like damn, do something dude !!
Again, im not kink shaming u if u like that, but i'm just curious about the whole thing.
( i would've asked on reddit, but i refuse to go back to that site :((( )