There are plenty of questions from experience we spend our whole lives trying to answer:
Why am I here?
What's the meaning of life?
Why do we drive on parkways and park on driveways?
Why do we do our math homework in junior high?
Tonight the answer to that last question came to me: It's because one day your wife will come home from work and ask if you want to make a couple thousand dollars by checking the answers in a junior high school student math book she's helping to edit.
Scratch that question off my list.