The X-ray of an elbow shown here comes from a 17-year-old girl who had embedded staples (shown by the straight arrows), an unfolded paperclip (curved arrow), and graphite fragments (arrowheads)
So this seems totally logical to me… if you’re feeling some kind of emotional pain (like your dad yelled at your mom, your dog is gay or teacher gave you a D even though you deserved it) you can relieve some of that pain by taking random objects, cutting yourself and slowly inserting these objects into open wounds. Then you let them heal over.
Then you fail security at the airport and end up in an X-ray session like this.