tl:dr, ftm/"ftm" people who have a thing for detransitioning/"detransitioning" and like other stuff that makes you question if they were really trans inn the first place, like if it was just for a kink or if they were just tomboys. I'd look into it on Reddit, it has a whole subreddit dedicated to just that ftm thing. Yeah copy and pasted my answer but just in case you didn't see it for the other, here ya go.