My 49-year-old boyfriend and I have not had sex in over a year. He says he has lost his desire for sex but wishes he could make love to me. He has told me his doctor says it is due to depleted dopamine levels. He used to use drugs and is clean 7 years, during which we have had sex until the past year. I figure the doctor’s poor prognosis is a story, an excuse. Recently he told me that he still enjoys masturbating regularly and insisted it’s not ED. I assume it was his way of telling me he can get erect, just not with me. What’s going on?