Very specialised humour

I don't expect most people to get this, because it's in German and it's along the lines of Spamusement! humour, but I found it hilarious, and I decided to share it. A little background info: I had written down a line from a song that I was having trouble remembering, from Melotron's Manchmal. The line is:

So, a few days later, Martha found this notepad on my desk, and she drew a little cartoon for it to caption:

LOL! What more is there to say?