For example, castration for the goddess was a big deal. (Kali had her crazed devotees as well. Modern S&M gives you echoes of this urge of the male pysche..) So there is no going back, no back and forth, no "fluidity" when you plop ye old bloody member on the temple floor in front of the goddess. Gender change. Yes. Fluid? No.
Btw, can't recall the source, but there are mystic schools that insist the '[Mother] Goddess' slaughters all these males because she is seeking her Perfect Man/Lover. So the drones that go 'fluid' for her are really just playing their part in the selection process.
https://aratta.wordpress.com/2015/08/02/inannas-sumerisk-og-...
[p.s. for historians. Since this comment was posted, I have lost 10 karma points in minutes - it is a touchy topic that elicits emotional responses. ;)]