Why do all guys genuinely believe another girl is better than their girlfriend even when she’s not?

[Anonymous]

Why do they seem to believe because this girl posts photos in such a way she’s better than their girlfriend? Even though their girlfriend is more attractive or easily equal to these girls?
All guy friends I’ve had do this too and and I even remember a joke in family guy stewie says Lois is way better than bonnie then says oh it’s because it’s a different person other than Louis.

Girls don’t do this with guys, so why do guys honestly believe because this girls posted a “thirst trap” she’s better than his girlfriend

Will this be the case with all men? Some of the delusions I’ve seen in guys are unreal

[boggboss]

I'm not sure what your expirances have been but they are clearly blinding u your under the assumption only guys leave there partner for thirst traps they see online thats just clearly a lie onto of u thinking all guys do that what rubbish am I reading

[Noahzaid]

That’s a false assumption, If you experience this then surely the relationship didn’t mean to last.