Not sure if rhetorical, but I think most understand it pretty clear that no one is offended simply by short stature or flat chest.
It's short + zero body fat (including boobs) + no hips + twig arms and legs + pigtails + school uniform + baby face + baby voice + childish activity + context clues as to being underage, etc etc etc...
We all know what it means.
the butt fairy. 🤓