Answer:
Arnold Schwarzenegger has a big one, Michael J Fox has a small one, Madonna doesn't have one, The pope has one but he never uses it, Bill Clinton has one and he uses it all the time! What is it?
What four letters frighten a thief?
How does Moses make coffee?
I walk yet I have no legs
What is an army man's favorite month?
Dark, feathery, and popular in Baltimore and fantasy books.