Below, we direct your attention to a 10-year-old girl who plays the blues. The fact that such a thing exists in the world makes us happy enough. What's better, however, is that she plays blues guitar, including a bit of slide, and has posted several videos of herself at work.
Some have tried playing the guitar with their teeth, behind their back, with their feet, etc. And then there was the inventive guitarist who, many decades ago, decided to slip a bottle over his finger and slide it along his guitar's strings (He probably emptied the bottle himself, if you know what I mean).