“Such things happen in amphibians but I’ve never heard of humans experiencing a spontaneous sex organ transformation.”
Now you have heard of Humans spontaneously transforming genitalia and sex roles upon reaching puberty. See the BBC documentary:
https://www.youtube.com/watch?v=-b-abEh2k6k
But can they light their farts and fly to the moon?
The first article, which was of great interest to me, confirmed the "essentialist" sex/gender understanding, that these sex and affective/behavioral gender are not socially constructed, but innate and genetic:
Human protandry...sex roles not socially constructed
If I am reading this correctly, all the presumptively "girl" children in the Dominican Republic village they researched who developed into men, were actually male genetically from the beginning (XY with SRY, like all males) but, because of an androgen receptor problem, looked like females in terms of external anatomy until puberty.
So they are not really girls turning into men. They always had Y chromosomes; they always had developing testes, not ovaries. But the testes were internal, within the abdomen; they enlarged and forced themselves to the exterior beginning at puberty.
This does not seem to be the case with the vast majority of transgenders now. Certainly not the case with Bruce Jennings.
That, however, does not rule out the possibility of some other external problem, such as endocrine disruption.
Here's a recent FR thread on the subject of endocrine disruptors in the water. They can suppress normal sexual expression in fish, 2-3 generations after exposure.
Yet another study shows: Birth control is reducing the fish population for generations
And humans?
I think we're seeing it now.
For instance, 25% of the baby formula used in the USA is soy-based, despite the fact that soy is a known endocrine disruptor (phytoestrogens).
All of our major watersheds are contaminated with xeno-estrogens, of which the waste effluent of Birth Control Pill and Hormone Replacement users is a significant source.
This is why it is so important NOT to assume that hormonally-confused and gender-fluid effects are a choice. It may very well be a matter of gender-toxins.
In order to respond compassionately and help gender-confused people, we have to locate, prevent, intervene, and remedy the underlying causes, genetic, epigenetic or environmental, which are pathological.
This is the opposite of supporting the LGBT agenda, which insists "it's their right!" rather than "something's wrong".