Married 25 yrs, and my wife still seems to enjoy sex. I believe that mainly it's because I give a good effort during, and I am in very good shape for my age. She even slipped once recently and said I was the "trophy husband". But regardless of her enjoyment of it, she has no creativity and makes no effort to that end, even though I have talked about that many times. She knew about my proclivity towards creativity, role playing, scenarios etc. since before we were married, so she can't say she didn't expect that side of me. So for the last 10 years or so, I have refrained from even initiating. Whereas I used to treat her in a sexy way i.e. spy on her in the shower, grope her, talk dirty, I have pretty much stopped completely. For her part, all she does is grab and stroke me to get me stimulated. This has been the way for the last 10 years, and nothing ever changes.
As someone mentioned earlier, you can eat your favorite meal for only so long before you get sick of it and find a new favorite meal. They don't seem to understand that, despite all that is known about men, and me telling her that. So can we be blamed for mongering?