Today, Dave has decided to answer every question with another question.
Q. What is Dave wearing today?
A. Why does it matter to you?
Q. How does Dave feel today?
A. Why are you concerned with how Dave feels today?
Q. What are the factors affecting Dave's mood today?
A. Have you done anything to affect Dave's mood, in either a positive or negative fashion?
Q. Why is Dave answering every question with another question?
A. Why not?