Anything can be a musical. The mega hits about the beliefs and practices of Mormons and that one about American history and a man named Hamilton are surely proof of that.
But how about a musical about dog food? Or plastic wrap?
Back in the day corporations commissioned musicals about their products, just to entertain executives.
Former David Letterman writer Steve Young collects albums from these unusual musicals. He's the subject of a documentary called Bathtubs over Broadway.