Why do some guys not like their girlfriends wearing revealing clothes when they follow a ton of provocative women/models on social media?

A lot of guys have issues with their girlfriends wearing revealing clothes and showing their cleavage etc but they would follow a ton of provocative/almost naked women on Instagram. What’s their perspective? In a way isn’t the girlfriend just being one of those girls that their boyfriend find attractive on social media? Why are the guys not okay with their girlfriends doing the same thing?

Why do some guys not like their girlfriends wearing revealing clothes when they follow a ton of provocative women/models on social media?
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