Good Riddles

Question: What demands an answer, but asks no question?

Question: What is the best way to keep your hat from falling off your head?

Question: Why did the chicken cross the road?

Question: "The Captain is my brother," testified the soldier. But the Captain testified he didn't have a brother. Who is telling the truth?

Question: Everyone asks for me but yet everyone hates to face me ,for someone I am agony for others I am relief! Who am I?