Nope, don’t mind at all - thank you!

Liking pictures on social media & watching porn are not cheating. They might be a dealbreaker for you but forcing this “boundary” on your SO does not make it reasonable. You can’t police someone into submission, all you end up doing is causing resentment & secretive behaviour. Either date someone who has the same rigid rules or accept that this is not a realistic or healthy way to interact with your partner.

I would imagine that he might want you to be able to address any issues and topics you might want to raise directly with him, face to face, rather than have to scroll through hours of inane posts & comments on a social media platform he probably doesn’t care much about.