Sounds to me as if he may be still embroiled emotionally with OW or perhaps even a new OW. Or that he still harbors the resentment that played a role in him having an A. Are you sure the A is over, and that he is not having a new one? Did you ever deal with the issues that you played a part in creating the environment for an A? I'm not saying the A was your fault, but A's don't happen in most good marriages, so there was something in your M prior to the A that built a sense of entitlement and resentment in your H.
I don't think at all that being 50 is an excuse for having an absent SL, or not being able to ejaculate. There may be physical issues though. Yes, things aren't working the same anymore, but many people have healthy SL into their 60s (and a few even beyond that). Does he have circulatory problems?
Maybe some more background on the A, your M, and your H's health issues could help us focus on the problem
Chrome
"Recollect me darlin, raise me to your lips, two undernourished egos, four rotating hips"
