I am 65 years old and remain very sexually active. In the last few months my ejaculations have weakened considerably in both intensity and in semental flow. Most recently, I find that I have ejaculated without even knowing and then quickly lose my erection. I have historically had a slightly enlarged prostate but this has never caused a problem before and my urologist monitors it regularly. Is there anything I can or should do? Is it really just my age and I have to resign myself to not having a fulfilling sex life?