I post here the point difficult to explain with histamines theory. Just some hypothesis ... :
Histamine are linked to orgasm, not to semen. After testicles surgery ejaculations are "dry" so the release of histamines by orgasm haven't change. If Pois is cured by the surgery Pois is linked to semen, not orgasm, the release of histamines is still present.
(about Animus case)
How to link testosterone therapy and histamines ? It seems the testosterone therapy didn't improve the symptoms which might be caused by histamine release like itchings, allergies.. I have found
a link. For mice, T injections seems to affect histamines. But high or low levels, that is the question.
(Demo's case)
Anti-histamines don't work. There are no cases of improvement with anti-histamines. And M.Waldinger failed too with anti-histamine test. I saw you made a difference between H1,H2 and H3 (I remember there are other Histamine sites H4 and maybe H5). It's a good idea but I don't know if meds can activate the specific sites.
The delayed's cases. Anti-histamines are released just after orgasm. But some Pois cases feels the flu-like symptoms some hours later (myself). Dr Waldinger explained he has some delayed cases too and he tried to link the quick cases and the delayed cases to different types of immune cells and immune reaction types. I don't think histamine can cause a delayed effect.
Too much or too high ?
So, I'm a bit sceptic about histamines as a trigger of the flu-like symptoms. Histadellia (high histamine lveles) + orgasm = very high lvels = symptoms
[Dispite some think histadellia is linked to PE, interesting for me ]
But you said histamines can be linked to fatigue/cognition levels.
Histahenia = low levels (after orgasm) = fatigue
This point is more interesting for me. There is a link between Histamines and narcolepsy. Histamines controle day/night cycles and vigilence states.