Boyfriend won’t stop looking at sex pages?

I’ll try to keep it short but I’m in the healthiest relationship of my life, everything is great, except he won’t stop following girls sex pages on social media. I don’t care if he watches porn because it feels less personal, but I have told him I don’t like that he follows sex pages. He unfollowed all of these girls for awhile, and then today I saw that he had followed them all back thinking I wouldn’t notice. I don’t want to keep bringing it up to him but it makes me feel bad and I feel it’s disrespectful that he is publicly following and liking these girls pictures. I don’t know what to do and any help would be appreciated, thank you :)