Answer:
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
found at the back of the book.
Iβm white; perfect for cutting & grinding. For most animals I am a useful tool.
hide me from your parents if you have done bad academically this year.
I help engines spin and pants stay up. What am I?
I flow from the Homerβs mouth when he sees doughnuts.