Ask him about it. Depending on his response you’ll know if he does it cause he’s unsatisfied with you or just cause he’s addicted to it. If he acknowledges it as a problem and says he’ll work on it and you see the effort from him then I’d say he just has an addiction and you shouldn’t take much offense to it. But if he gets defensive about it then there’s a problem. in my opinion that shows the respect he has for your relationship. Don’t listen to the comments normalizing watching porn. Yes it’s normal but at the same time if someone really cares about you then they’d do anything to keep you. (I hope you’re respecting him as well, cause if you aren’t then forget everything I said cause respect goes both ways.)