"What do you need boy robes for?" inquires Madam Malkins.
"I'm sometimes a boy," the girl explains.
"What?"
"Look—"
"… I'm guessing you are not asking me, an eleven-year-old, for The Talk."
"Are other magical things, like, the same species as humans, or what?"
Anthony frowns at him. "I don't really see why that'd be an issue – as in, why they would be nonviable. Sure, a human and a cat wouldn't work, but it's just how the species work?"
"That's not how species as a biological category work! The definition of a species is 'cannot have fertile offspring'!"
"… Okay, so by that definition then I guess we're probably all one species? Which would be, I dunno, humanoid magicals?"
"I mean there are people who develop new spells, people who study magical creatures? But we don't really – science? It's not standard curriculum or anything."