It's a tough enough question to answer when it's posed by an adult, but how do you answer it when your six-year-old wants to know what sexy means? Or how do you explain that oldie-but-goodie — why is the sky blue? If a kid asked me that, I'd probably invent something about unicorns and oceans, but I certainly wouldn't know how to answer it truthfully in grade school vernacular. Author Wendell Jamieson wrote down the zillions of questions spilling out of his son's mouth and got answers from all sorts of real people. What's the weirdest thing your kids have ever asked you? And what are the questions you actually wouldn't want to answer with the whole truth?