I have not heard it, but it does sound like something someone might make up to warn children away from gluttony, or some other such nonsense.

[ Fairy tales, man.

Anyway, he follows Minato’s gaze to the windowsill, and experimentally swipes at it with a finger. He comes away with a glob of frosting on his fingertip. After a moment of considering whether or not this is a good idea, he just… pops it in his mouth.

Oh, it sure is frosting. ]

You’re right. And I don’t seem to be dropping dead or under attack from a witch, so I think we’re in the clear to try whatever we like.