Chromosphere:

There are lots of areas on her body if given the proper attention can bring her to arrousal. But when she wears head to toe flannel PJ's, it can be impossible to get to all of them. There is only so far that you can push these flannel sleeves and legs before they get too bunched up on the body.

AS for the arousal backwards, yes it is blunt, but it pretty much is the truth. Honestly, who wants a spouse that operates this way? The HD spouse basically ends up providing the desire for both spouses. In the long run, this will usually fail. As Dr. Harley says, the only real solution is that the LD women must regain some level of desire.