Mr. intuition and I have effectively been monogamous for 3 years now. Other things have taken priority over swinging, so it's been put on the back burner indefinitely. Neither one of us has cheated on the other. So if he said he just couldn't do it anymore, I'd say that was fine with me.
I'm sorry if we seemed to be picking on Mr. mnsnen. We understand that he's a good husband and you love him to pieces. Like anyone else with an addiction (however severe or mild), they
have a problem; it doesn't mean that
they are the problem. He's just got this thing he needs to deal with. It's not just men who cheat; it's anyone who tries to fill in the holes in their lives by turning to someone outside of their relationship. So...why is it that he feels he needs more than just you?
If you have or had even the slightest interest in swinging, you really should look into it. One of the most unexpected side effects of swinging was a HUGE spike in our passion for one another immediately after, and up to a week following a swinging encounter. It was just crazy. Couldn't keep off of one another. Perhaps if you became involved in swinging, it might give him some perspective. As in "what's good for the goose is good for the gander". Would he feel any differently if the shoe was on the other foot? "Well, gee honey. A woman just has her needs. I'm sorry, but you'll have to decide whether or not you can live with me needing to have sex with other men." He may very well be just fine with that - even encouraging - but some people are not.
Like I said, it seems to me like he's saying, "But I'm sooooo huuuungry!" and we're saying, "No, you're not. You just THINK you're hungry." (How many times have we said this to our kids?

) He just has it in his head that he has no control over his desires. I'm not suggesting that he repress his desires; I just think maybe they could stand to be reigned in and moderated so that they don't trample over your relationship, your feelings, and his life.
Also, I didn't mean to make any assumptions about your religion. I was just stating my own personal beliefs as an example.