My issue is not ED but RE. I can maintain erections for considerable lengths of time while getting "close" repeatedly. I'm working on it with help from SO (who hobbies with me) as well as with medical professionals. Interestingly, the professionals almost universally commend me for trying to get assistance and report ED and RE are far more common than reported for the over 45s but many men are reluctant to report due to believing the current male sexual stereotypes.
I'm not going to get into causes or treatments but will rather urge men who even "think" they are experiencing ED or RE to seek professional advice. It is stoopit to endure that which need not be endured.
OBTW, sex still feels WONDERFUL!, which is why I keep at it.