I want to apologise in advance for this one... I'm sorry... no, really I am!
One day three very attractive women, a blonde, a brunette, and a redhead, are running away from a farmer. The women ran and ran until they came upon his barn. They each ran into the barn and hurried up the stairs where they found three sacks. The farmer came upstairs to look for the women. He saw the bags and went to investigate. He walked up to the first bag and kicked it.
The brunette hiding inside said, "Quack, quack."
The farmer said, "Oh, there must be ducks in that bag."
He goes to the next bag and kicks it. The redhead hiding inside said, "Bwaak, bwaak."
The farmer said "Oh, there must be chickens in that bag."
He walks over to the last bag and kicks it, and the blonde hiding inside said, "Potato, potato..."
BUT, the farmer was blonde too, so he said, "Oh, there must be potatoes in that bag."