There is a science behind why we get “ear worms” – those musical hooks that get stuck in your head and keep rolling involuntarily off your lips no matter how much you want them to go away – but you never really know why a specific ear worm gets into your head and won’t let you be. For some reason Saturday I picked up an ear worm in the morning that stuck with me all day. It was a line from a song by The Who. I hadn’t even heard it on the radio that day. It just popped into my head out of nowhere.