I dont want to dog on any of these other suggestions. you know your wife better than anyone else here, but what it sounds like to me is that you have been meeting men for sex and you havent been meeting lovers. Your wife obviously likes sex, but she doesnt need more sex, you provide enough sex and thats it.
So you are looking at your wife wrong. I have worked with a lot of couples that the husband and wife were not on the same page sexually, even though they love each other and want to please each other, but they are unable to communicate with each other. I have sat at a dinner table with the husband tell me his desires and the wife doesn't "get it"
And then I have the wife tell me her desires and the husband "cant hear her."
its crazy to think that some people are just tone deaf so much. But its reality.