Answer:
A cowboy rode into Friday. He stayed in town for three days and rode back on friday. How is that possible?
He has married many women but has never married.
What can be big, white, dirty and wicked?
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
When they are caught, they are thrown away. When they escape, you itch all day.
What is so fragile that saying its name breaks it?