I played through Fleshcult in a couple of days and really enjoyed it! I played an incubus with the tome of genital swapping and encountered several trans men in the generated NPCs. Unfortunately, I saw these trans men be misgendered a few times, being referred to with she/her pronouns in the flavor text (particularly when interacting with genitalia). It was kind of uncomfortable for me as a trans player and broke immersion, so I thought I would bring it to your attention.
I played a gay character, so I didn't encounter any women. For this reason, I'm not sure if there are pronoun errors for trans women as well, but I would keep my eyes peeled if I were you, just in case.
If you'd like me to go back through and find the specific lines and write them down for you, I absolutely can do that; just let me know.
Thanks for your time and thanks for developing Fleshcult!