Cows and Tutu's?

Do cows and tutu's go together? Stef thinks so. She came to me the other day and told me that you get milk out of the cow's tutu's! I looked at her and said "what"? Apparently at school they must be talking about farm animals. She said that when you milk a cow you have to grab the tutu's and squeeze, but not to hard cause you don't want to hurt them. Good thing I was already sitting on the floor. I was laughing so hard. So I explained to her that cows have utter's that the milk comes out of and you wear a tutu when you dance ballet. So now she will ask me "mom what are those things again on the cow"?