I have a...complicated relationship with the piece this is from, but this one part sticks with me like a bullet in my chest - The Song of Alexander, CiceroProFacto
There was a bit in a PPC mission where Martin the Warrior (a sapient mouse) overheard two transformed human agents discussing boobs and processed it as them discussing "an unusually large pair of birds, or perhaps idiots".
https://hetalia-kink.dreamwidth.org/73066.html?thread=431764842 (Only funny if you know the reference, I know.)