If I can just create some primal desire in my wife (desire for me that is, she has no problem with desire for another man) then I can demonstrate the 'new' me.
Maybe you trying so hard to drum up desire is actually making you less desirable?
I wonder how hard these guys she finds desirable are trying to create desire. My guess is nowhere near as hard as you.
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl