Kiss is Just a Kiss

One day a teacher had a taste test with her students. She picked a little boy to do the first test. She blindfolded him, put a Hershey kiss in his mouth and asked, "Do you know what it is?"
"No, I don't," said the little boy.
"Okay, I'll give you a clue, it's the thing your daddy wants from your mom before he goes to work." That's when a
little girl at the back of the room yelled,
"Spit it out! It's a piece of ***!"