Tell me if you have heard this one before...

A girl walks into a kitchen. Sees her mother kneading bread and asks if she can knead too. "Sure!" Her mother replies and the girl kneads away happily. As her mother finishes up the loaf and places it all buttery and smooth in the pan to rise, the girl asks "May I eat all this?" and gestures to the surface on which she had been kneading. "The flour???" Her mother questions with sharply raised eyebrow and more-than-mild disgust on her face. "Yes!" The girl sparkled as she spoke "It soothes my mouth."