Neicie, Has he had his testosterone checked? Is low T a possibility? I am surprised that the doc would jump right to erection pills without doing a blood test to see if there is something else going on too.
Cause like you said, you can make a person physically capable of marathon sex, but if the desire is still absent what in the world is the point??
Also, I had one other thought...maybe he was not fully "there" because he was nervous. You know, thinking "If I have these pills, she will be expecting this of me all the time." Some people just don't want to want, and it is a mystery why not.