[Off-Topic]
(Moderators, feel free to split my message and maybe the whole "blue b***s" digression into some male discomfort thread.)
Angelina
I'm not sure if there has been serious investigation to clearly link the feeling described with the above term with different amount of sperm in the testicles. (Actually the whole sex research is such an absurdly young area. So I wouldn't wonder if that part was still "in the dark" - even though about half of humanity has an instinctive insight ... ;-)) From anecdotal reports I'd say that there is both a short-term component of "blue b***s" and a long-term component.
The short-term is the acute, very strong sensation during heightened level of sexual arousal. The long-term component is something that I sense as straining, stretched, "waves" or phases of discomfort. Noting them for mere minutes or even few hours, then subsiding and later returning. In my experience, they clearly worsen over prolonged phases without ejaculating.
But that may strongly vary from person to person or even for the same person in different states. Myself experienced something like a plateau (or even some spontaneous "mitigation") sporadically. (Means even w/o cumming.) The noFap-community or maybe the one or other spiritual group has some encouraging stories, how the discomfort will (eventually, if you do it right, maybe...;-)) resolve and one manage to get to a higher state ... (Hence, my "Nirvana" jibe.)
Personally, I've apparently never felt that state beyond "lower needs", yet. My body always took an "emergency exit" and got rid of any excess amount of liquids ...
I should note: It has been substantially well documented, how male reproductive organs and nerve systems cause this emission one or the other way, whether wanted or not. And: Blue B***s tend to make stupid. Or maybe more precisely: Twists and tunes our brains towards seeking very primal, very carnal solutions. As said, to weal or woe.
Nonetheless, that could somewhat be managed with appropriate chastity equipment and regime. But even with the most unbeatable equipment and strictest regime, they can't prevent ejaculating during sleep. (And possibly shouldn't anyway.) One reason, imho, why I think that male chastity works worse than females'. It somehow lacks or "leaks" ;-) no matter what I do. But maybe that's just cheap male excuses ...
I think it was sex researcher William Masters who once admitted that it was actually the female sexuality that was (in contrast to contemporary attitude) vastly superior compared to the males. In think this is true in many aspects. I congratulate everyone with female genitals to not suffer from blue b***s. Dehydration might still become a problem to some extend. If you know what I mean ... ;-)