i think people have a hard time reconceptualising someone's gender
which sucks if they knew you pretransition, but if they didn't, finding out you're trans isn't going to automatically flip how they see you
f*, i haven't even socially transitioned and people who first read me as female still seem to slip up, even after finding out i'm not. was quite funny to be told i don't deserve the vote because unlike men i don't get drafted... after sharing a room with the guy who said that...