I am writing this on behalf of my fiancee. We have been together for almost 7 years now and though we never had sex we have been quite intimate with each other, without facing any problems. Around a year age, he did not have an erection during our intimacy. He was under some strong medication which might have affected him at that point. After that, I had seen and felt him have erections, but there has been a lack of sexual desire/excitement on his part, which he admits to. Please help.