Cuckolding is a very common fantasy. Pick up any copy of Penthouse Letters paperbacks and you'll see that over half the stories have that theme. If you and your wife are happy, enjoy and don't worry about what others may think.
This is a new one for me, but I'll give it a shot. If you and your wife have, for 38 YEARS, worked out a mutually satisfying sex life, I am incredibly impressed!
I DO think we have a slight language gap here that I would like to clear up........for some reason that escapes me. When you say that............" We started a cuckold life style were she had many lovers and I got deeper into my solo addiction."
In this country, the term "cuckold" is not terribly flattering. By definition it means "the husband of an unfaithful wife." It is my impression, and correct me if I'm mistaken, but I believe this was mutually agreed upon solution by both you and your wife. That you have remained married for 38 years tell me that this arrangement has not caused great anguish in your marriage. Does, in fact, speak of a healthy compromise between two people who obviously love each other very much.
As to the use of the term "addiction" in reference to YOUR sexual preference, I think is, perhaps, a bit "nit-picky" on my part, but to me it implies that you think this is "bad," or "wrong," and I disagree with that. It is YOUR way and therefore is the RIGHT way. But we are not here to discuss semantics.
Personally I have never heard of anyone being born with a genetic preference for masturbation, but you could fill epic tomes with what I don't know! You could be 100% correct in your diagnosis. But...........since you have written to an Anxiety Forum about this, my guess is that this is now bothering you. My advice would be to consult with a urologist who may have the answers you seek. There may have been a physical reason you could not reach orgasm and now there could be a physical reason you cannot maintain an erection. If there is nothing physically wrong, then your next stop would be a therapist who could help you understand your preferences.
I do hope you let us know what you find out.
I wish you the best.
Peace
Greenlydia