What the fuck, there is no mention at all of femboy/Futa/TS/Trap anywhere in the genres or this thread (as far as I know) so how the hell do you assume she has a cock.
The simple answer is that I didn't bother checking the genres, thread, etc.
I was just playing (and enjoying) the game.
I've got about 75 games in my "Fucking Excellent" folder, 115 games in my "Try Playing Soon" folder, and 972 games in my "New To Review" folder.
On the one hand, I'm a fucking degenerate that spends a LOT of time playing adult games (mostly pirate downloads from F95 here.)
On the other hand, I was (and maybe will be again) a writer for adult games. I've made a habit of being aware of the industry trends, competition, etc.
The character was shy, and behaved like she had a secret. It seemed like that secret would be revealed if she participated in the nudist program.
Futa/trans is an EXTREMELY popular *fetish* in Adult Interactive Fiction like this.
Also, there was something about her look that just made me go, "Hmmm" from the first time I saw her.
I can't explain it. It was just the impression that I got.
I assumed she was hiding candy. Or that she had similar reasons for hiding her body. Like if she fully transitioned, yet she had not shared that with anyone yet. That is to say, no one had seen her new body except for doctors and herself. She didn't seem like the type-of-shy that had never exposed her body to anyone ever. She just seemed like she was hiding a secret.
It could have been a penis. It could have been prominent labia or a large clitoris that she was uncomfortable showing. It could have been a mutant like Kuato in Total Recall. Whatever. There was clearly something secret that she was hiding that would have been exposed and humiliating if she let someone see her naked body.
So, that's how I came to that assumption.
And although it has been essentially disproved and non-canon, I still think it would have made more sense than what was actually revealed.