I have a question. When he is looking at porn is he masterbating?? If he is but not making love to you then he is "cheating" on you with Porn. I know this because I did the same thing to my wife. This was before we had children. It was when we first got the internet and all the porn that came with it. I was using the porn to get my sexual satisfaction and not my wife. We would still have sex but not nearly as often. I am not going to go into all the details about how this effected our lives as this would take awhile and I don't want to ramble. (Feel free to ask any questions if you want) but know that I did finally stop looking at the porn for the sake of our relationship. It was not easy I failed a few times and I sort of had to hit rock bottom to wake myself up. But I did it and our relationship is as strong as ever. I still like to check out the nude celebs to help rev myself up (men are such visual pigs LOL)and my wife is cool with that. In fact I don't even like watching full hardcore porn anymore. It's not really even a turn on.

Addiction of habbit - whatever you want to call it - It was not easy to break. Sounds like your husband is having some trouble breaking the habit also. Just try to keep talking to him about it.