Thanks for your comment! I was thinking about this a little and I wanted to get your opinion. I don't know if you have tried playing it, but the core game currently does not have a huge focus on your genitals or gender as the protagonist. It's more about others using your mouth and ass for their pleasure.
What I'm saying is that it would not be hard for me to quickly add a menu at the start to choose your gender. I would have to change some of the dialogue and change up the story just a tad, but I am not sure the actual gameplay/dialogue would change meaningfully. Especially since the characters already mostly call you things like "slut" and "bitch" which can also apply to women. The anal scenes could also stay the same in theory since women obviously have buttholes too.
But would this be satisfactory for you? Or would you be looking for more gender-specific story and dialogue?