When we stand up it lies flat. When we lie back it stands up.
What is black when it is clean and white when it is dirty?
Bill's mom has four kids: Mary, John, and Alice. What is the name of her fourth child?
A white field, and when it is plowed, its soil is black.
Who shows her boobs?
Big as a saucepan, deep as a cup, Even a river can't fill it up. What is it