I'm still trying to figure out why it needs a practical use? If practical application was the basis for a thing or subject's existence, then we'd be losing all sporting events, there would be no entertainment on radio or television (just advertising, because it's practical), no music...heck, we could even do away with fine dining, because all that is required from a practical viewpoint is that we eat something nutritious, it doesn't have to taste good to be practical...