My (22) boyfriend(23) illegally pirates videos from OnlyFans girls.

A while back ago I got a gut feeling and went through my bfs phone and found out he was visiting/clocking on multiple onlyfans platforms. I brought it up to him the next morning and asked him if he pays for them and he said no that he pirates them. I then told him how wrong that is to 1. not only illegally see sexual content but 2. also how he shouldn’t even be on onlyfans to begin with while in a relationship. I told him it’s not normal for people to ILLEGALLY find ways just to watch someone’s porn. He apologized and said he wouldn’t do it again. Fast forward to our birthday week (we share the same birthday) I had another gut feeling and went through his phone and found out he was doing it again. I haven’t brought it up yet Cause i’m not really sure what to do. Is it cheating? Or is this something i’m supposed to just accept that men do?