Q: I fly very infrequently, but I can't sleep on a plane. To me it's like trying to sleep in a folding chair in the middle of a bus station. Instead, I like to read but notice that I am usually the only one with my light on.Sometimes other passengers give me a discouraging look. How do I handle this, or should I not worry about it?A: The overhead lights on airplanes are like reclining seats. With seats, you have a button to recline, so every passenger gets to decide if they want to lean back. If reclining makes you more comfortable, it's fine to do it. But if it doesn't make you more comfortable, it's polite not to recline, so the person behind you has more room. And if I could digress briefly, don't ever recline without warning the passenger behind you, and do it slowly. Otherwise, you might break their laptop or spill their drink. With the overhead light, it's fine to use it on a night flight if you want to read. But if you don't need it, turn it off.