Small Sweaters and Black Rectangles

Sherlock is covered in blood, so John lends him his sweater. He also lends him his iPod by mistake, and what else is a curious detective to do but see what's on it? What he finds is the absolute last thing he would dream would be on his best friend's iPod. This was a prompt given to me to beat writer's block, and this is what happened. I hope you enjoy it! :)