My dad used to love telling this story on his grandparents:
They were traveling in Virginia if I remember correctly, and they stopped at a little restaurant to get some lunch. They're checking over the menu and his grandmother said she wanted some of those mountain oysters. Well, grandpa kept telling her no she didn't. She said she wanted them, that she loved oysters. He finally looked at her and said, "those aren't oysters, they're bull balls!"
Needless to say, she didn't get the oysters.
