Chastity and orgasm denial discussion

There’s a discussion on the Comments part of this link

about whether ruined orgasms and milking are dangerous for prostate health. Of course there has been much on several forums about aspects of chastity and prostate health in the last few years. My question is really about milking. Surely milking is really not much different physically from anal sex in a gay relationship and I don’t know if gay guys have increased prostate problems, I’ve certainly not read about it. I’d be very interested to know what you all think.