I've never been threatened by my guy watching porn or looking at pics. I like to look at that stuff too but it doesn't take away any of the feelings I have for my spouse. I don't compare him to what I see because it's not real and I know he's the same way. It's just a way to blow off steam.

I have a friend that feels that porn or masturbation is cheating. ANYTHING sexual that doesn't involve your significant other is cheating. I personally think that is insane but it's how she feels. Her husband put a porn block meant for kids on their computers to keep him from being tempted to look. He respects that it's important to her so he doesn't do it. Maybe you two could try something similar since it hurts you so much?