I believe that music sounds like people, moving. Yes, the idea may sound a bit crazy, but it’s an old idea, much discussed in the 20th century, and going all the way back to the Greeks. There are lots of things going for the theory, including that it helps us explain (1) why our brains are so good at absorbing music (…because we evolved to possess human-movement-detecting auditory mechanisms), (2) why music emotionally moves us (…because human movement is often expressive of the mover’s mood or state), and (3) why music gets us moving (…because we’re a social species prone to social contagion).