If you make a big deal about the porn, and believe me, I have, I find it becomes a taboo thing and a thrill seeking thing that he can't wait to indulge when you're not around. If you ACT AS IF it doesn't bother you (and I stress... ACT AS IF), then it looses its power.
What are things he does like about you, finds attractive in you? No, we may not have the sexual prowess of these porn stars, but remember, they do this for a living. They pay tons of money on cosmetic surgery, make up, have personal trainers, etc. etc. And often times, they are shallow. Do you think he'd want a relationship with a two dimensional woman who is only concerned with her looks? How long can a relationship survive on sex alone? Will she be there when he hits a crisis in this life, if his mother dies, or he gets laid off, or is diagnosed with an illness? No. Absolutely not.
So find out what he finds attractive in you, and build that up. Focus on that. Find out what you like. Pursue your interests and lose the focus on what he is doing. Not that he'll lose interest in the porn, but as you add your life experiences to the mix, he may want to pursue you, get your attention more. Make him seek you out. Then reward him.
It sounds a bit like dog training, and maybe it is. But as a parent, I have found that putting a lot of attention on bad behaviour only encourages it. Have intelligent, rational discussions about it, the same way you would if you found out your child was failing a course (i.e. don't berate him or attack him, but talk about what you both are willing to do, compromise, negotiate). But most of all, you may have to reign in your feelings (or rather expressing them) so he is not afraid to talk to you about it, to avoid the drama. He will probably respect you more for this.
You may not come to an agreement. You may have to accept this then, or make some other choices. Until there is some major shift in our society, porn will always be there and easy to access. OK... fine. Will it rule and control your life, happiness and wellbeing? Find ways to empower yourself and not be a victim.
I am writing all this, not just for your benefit, but for mine too. I need also to continue to empower myself and not be totally wrapped up with my man.
One more thing... does he have other interests? Why don't you try to work on those? Play computer games with him and get competitive with him.
The following is to remind me that I am a great woman, and I mean more to my man that some porn star or some pin up girl.
My man also loves to Jeep, go off roading, and does his own repairs on his jeep (part of the thrill and he gets boasting rights). Well, I decided to join him, and help him with the repairs, I winched us off a rock when we were stuck, I have cut 1/4" steel to make bumpers, weld them together, and he laughs, because I warn him to leave some work for me to do... funny thing is... one time we were in his buddy's mechanic's shop (and yes, of course there are calendar pin up girls...) so I got there from work, went in the back to change out of my skirt and high heels and into a mechanic's jumpsuit, pick up a MIG welder, and start working on the Jeep. He told me later that all the guys in the shop were looking at me and couldn't keep their eyes off me... it made him a little jealous. HEHEHE LOL... even though there were pictures of half naked women on the walls, they were looking at me. What does that tell you?
I've changed a drive shaft on the side of the road, I do my own oil changes, so I've learned to save money. One time, we changed the sway bar links and tie rods & tie rod ends, changed the wheel hub to replace the ball bearings, etc. on my 13 yr old van and had to deal with bolts that wouldn't budge because they were solidly rusted in place (I boasted that we did all this work and I didn't even break a nail - and I have long, painted nails!) After a 13 hour day working on the van, he snuggled with me that night, both of us aching and sore, and he told me how much he appreciated me being not only able, but willing to help him. I've learned I can do a hell of a lot. And it's become one more thing he finds attractive about me. Interesting, eh?