I'm a man in his fifties and i haven't been able to achieve a full erection in 20 years. Partly age related and i think more related to if you don't use it you lose it.
20 years ago i had a lengthy addiction to transwomen. Bottoming with transwomen. I would normally orgasm and cum from prostate stimulation.
I got so into cock that i was able to take cock from men even though i'm not naturally attracted to men.
Now at best i can only get a semi. To masturbate takes a long time and i have to stroke hard and fast in order to cum. Cock has ruined mine. I need to receive cock to cum basically. The only sex i could have with a woman would involve her penetrating me anally also.