From your list of why men have lost their desire for their wives, one common theme is that the wife is no longer attractive to the man. I personally know a couple where she is the HD and he is LD, and he told her he does not find her attractive. For men whose primary need is physical attractiveness, I can see where many of the items on your list could be "physical attractivness" related. In fact 6 of the 11 excuses are related to physical attractiveness.
