honeypot:

One of the big problems about lack of sex is when you do have it, things happen TOO quickly, and for both of us. My wife will orgasam, and many times it does not last long enough, or it happens too quickly, and I get the impression that it was almost not worth the effort she put into it. Maybe HD's wife is similar. Then of course, since it takes so much effort for the short pleasure, they start to avoid doing it.