It's not a fetish. It's as much an ask as wanting to select player gender and the gender interested in. Fat girls with penises and fat boys with vaginas very much exist. It's a desire to not be invisible in a game i find fun and arousing.
I'd like to add transgender support for player character creation. At some point, I will add the option to date men as well as women & when I do that, I'll probably add the ability to date transgender characters too.
This will all be completely optional & something you opt into rather than being on by default, similar to enabling player weight gain.
Thought about somthing similar (not directly related to trans characters).
For Male player characters: The option, in bedroom scenes, to choose between having standard intercourse or using your hands. Since the lesbian scenes are already there (which i naturally enjoy btw) this should not make for too much (re)writing.
And vice versa the option for Female player characters: to use a strapon and play the male type interactions.
Both would offer a cool variation for storytelling, and ofc you could also extend this by differentiating the outcome, some characters enjoying one interaction more then the other, maybe challanges when getting fatter ... u get the idea.
regards,