“There is no such thing as a shoe! Don’t believe me? Let me prove it to you. When I say ‘shoes,’ what do you think of? Maybe you think of your dad’s tennies, or of high-heeled boots that could minimize your feet. Me, I think of my favorites, my fabulous 1940s Carmen Miranda dancing shoes with the painted wooden cherries dangling from the ankle straps—cha cha cha—they’re in here somewhere. So what is a shoe? Shoes are an idea. An ideal. An ethereal concept that we attach to any variety of...of thing we attach to our feet. Shoes don’t have to cover...