A love song to a dog? Believe it or not, it's actually not a rare occurrence in the world of rock. Paul's little finger exercise, however, was only partially inspired by his longtime companion, meaning that "Martha My Dear" has layers in it that have nothing to do with Old English Sheepdogs. It could be about his creative muse, or even a broken engagement. Or maybe it's just a richly embroidered piano exercise. Learn all about "Martha My Dear" in my latest Beatles fact sheet.