taking you at your word that you’re being genuine, this meme is referring to the common situation where a cis man is fetishizing a trans woman while assuming she still has her default hardware (i.e. hasn’t had bottom surgery) and asking inappropriate questions to her (“how big is it”)

you may direct further questions to me via DM; asking these questions in the context of this meme seems to be being received poorly, for understandable reasons, even if your intentions are genuinely to understand