Not sure what the big surprise is.
Women offer prostate massages. And yes put a sex you up your ass and you can stimulate the prostate and have an orgasm and prostate ejaculation no sperm and you don't even need to get a full erection.
Yes I did it a number of times.
Perhaps back in my younger days some of orgasmic wet dreams were more prostate oriented.
It is healthy for the prostate to clear it's channel.
As for the guy with continuing ogasum or getting them at a drop of a hat , that sound more like a medical condition was causing it.
Not sure how many of us guys over 60 even have very intense orgasms any more .
I have not for a number of yrs.