I am sure D&J jas a video about it, I'll look for it. In the meantime:
Have you ever talked with him about this? Not that he won't get the message if you're hurt/upset, but have you talked to him? If you already did, then it may be time for you to rethink about the relationship. I mean, porn is good, but I would prefer to be with the one I love the most than to be staring at naked people in the computer's screen. I would even prefer to get to know my boyfriend's family than to be watching porn. And even if I don't, well, it is my partner's family, I should be nice with them!
I think that if you haven't talked to him at all, then do so. He will have to get the message, but if he refuses to even attemt to change, he may not be worth the time.
Good luck, hun. I hope everything turns out for good :)
-Jean