I have been married for 38 years. I have never touched another woman since before we were married (actually several years before we were married because we went together for a couple of years before we married). I have always looked at other women. My wife will help me in this endeavor. On the beach, walking down the street, she will point out someone that she thinks would turn me on. 'Did you see that one with her tits hanging out,' she will ask.
Porn is very erotic to men. What is the harm in looking? You should join him and ask what you can do to fulfill some of his fantasies. Check out the porn sites with him, join in and masturbate together. Watch some porno films together. Enjoy, do not take this as a put down for you. My wife and I will watch a porn tape and we will do the some thing that is happening on the screen and see if we can hold out as long as they are.
If this is repulsive to you, I feel sorry for you. It seems to me as if you are trying to control him by asking him to stop. In a way that is a turn on. I love to have my wife catch me masturbating, so masturbating when she might just walk in is a turn on.
He is quite normal. Good luck. Write in to let everyone know what you have decided. Remember there is a lot of work involved in keeping a long term relationship fresh and fun.