Porn Issues

Does anyone else struggle with their boyfriend watching porn/looking at girls online? I don’t necessarily feel insecure, for the most part I’m pretty happy with my looks. But whenever he does I immediately hurt so deep inside and it feels so wrong. I don’t really enjoy porn myself so I guess I just don’t understand why he wants to look at it so badly. He doesn’t do it that often but I started working full time and now there are two nights a week I’m working and he’s home and i can’t help but be anxious about it and assume he is. We’ve had so many conversations about it and he basically just tells me that it’s his right and it has nothing to do with how attracted to me he is. But in my mind if it were enough for him to just be with me why would he need to fulfill these other desires of being with other women? It makes me feel super disconnected from him and we end up just being cold and disconnected for a few days after it happens.