OK.
So, firstly, let’s not go into why I have sudden interest in this. :o
Theoretically speaking, are the male non-ejaculatory orgasms that tantra claims to produce
a)harmful
b) significantly more pleasurable?
I’m hoping for some feedback here, hopefully from anyone with personal experience. 
They are not orgasm’s in the common sense of the word. Some people may thing a Tantric Orgasm could be likened to a Champagne bottle shaken to the extreme and not allowed to blow it’s cork. No the case with Kama experiences. See here .
Never think of them as harmful, that is not the mindset needed to explain the phenomena. If you have a complete KAMA SUTRA text at home, read it and learn. It is not something that can - in my opinion - be accurately explained.
BTW. Significantly more pleasurable is a great way to describe the experience…
I had a book, “The Multi-Orgasmic Man” that my sister (of all people!) gave me as a wedding present. I never got around to reading it, and didn’t dare bring it to this country, where the customs inspectors dig through one’s personal items. So, uh, I guess what I’m saying is that I have no idea. Gosh, aren’t I helpful? But the few times I’ve had what appear to be non-ejaculatory orgasms, they were a bit unsatisfying. Perhaps I was doing it all wrong.
According to my (college) human sexuality instructor, the male orgasm and ejaculation are two separate things, they just normally happen at the same time.
So, I would say that it is not harmful to have an orgasm without ejaculating.
Well, as long as the guy is not voluntarily having retrograde ejaculation into his bladder, generally done by gripping the underside of the penis just prior to orgasm, to prevent expression of semen. Not that retrograde ejaculation is particularly dangerous, but it can be a bit disconcerting for the individual (and partner), and can cause occasional urethral discomfort if done repetitively.
Voluntary retrograde ejaculation should be differentiated from spontaneous retrograde ejaculation as a result of disease states.
Neither of these have anything to do with Tantric sex, btw. 
At least I don’t think they do. I haven’t kept up on my tantric knowledge in recent decades.
Over at nerve.com one of the writersdid it for science. He sorta makes fun of it because of the hokiness factor. Can someone explain whether or not you have to to hum and align your chakra’s and stuff? My wife and I are pretty non-hokey and would feel uncomfortable going “Ooooohhhhhmmmmm” like some buddist monk while gettin’ busy.
-Tcat
I know I said I wouldn’t go into it, but, I think I am.
(What a well-constructed sentence that is.)
That is, we were doing normal sort of stuff, and through a combination of wrist cramp and sadism (you know, having to change the tightness of your grip, and where your hand is, over and OVER again, at a particularly vital moment) I seemed to have broken irishfella.
That is, he was very happy, for a very LONG time, with no ejaculate, and he was STILL HARD for about 1/2 hour afterwards.
Which worried me (he was happy though).
So, no actual squeezing involved QTM, and definitely no humming and chanting Tomcat.
Reminds me of a joke-
When it first hit the media that Sting could have sex for six hours without an ejaculation, people went crazy. After some initial embarrassment that people had taken it out of context, he later joked about it, saying that he was trying to get his wife Trudi to try Tantric shopping- you shop for six hours but never buy anything!
If there is any pain or unusual bending of the erect penis, I’d go to a urologist and determine if irishfella has Peyronie’s Disease. Otherwise sometimes known as “bent spike syndrome”.
This happened to me. The cause was a result of a relatively mild trauma to my penis during intercourse. I too seemed to hold the erection longer than normal after orgasm. However, the trauma led to Peyronie’s Disease. I could never quite figure out why they called it a disease, but it was certainly real enough.
Qadgop may have better info of course. But I thought I’d mention it as a possibility to watch out for.
Learning how to control one’s self such that one does not necessarily ejaculate when orgasming makes it possible to have multiple orgasms. Yay!
For me, the trick is to not over stimulate. For example, gentle pressure on the pubic bone above the base of my penis rather than direct penile stimulation slowly brings me to climax while still permitting me to mentally shut things down just enough to orgasm without ejaculating. No physical stimulation at all makes orgasming a challenge (though it can be done). Too much physical stimulation makes orgasming easy, but orgasming without ejaculating a challenge. Mild physical stimulation makes it possible to control orgasm and ejaculation to the degree that orgasm can be brought on repeatedly while the ejaculation can be held back. It’s all about mental control, and like many things, takes practice.
Algernon, nope, things seem pain-free and kink-free.
I guess I just found a new way to make my man happy.
PS
DAMN! Muffin, you’re a lucky man.
irishgirl, glad to hear everything is fine with irishfella. I tell you, Peyronie’s was a pain, both literally and figuratively. Took about 9 months to clear up. But, happily, no long term side effects resulted. (it all happened about 20 years ago).