... Because it amuses me.
In case you don't remember the incident MP is remembering in the last panel, it happened in CosPain #191. Fun fact: I made a handful of strips that set up this story that all had to be published before strip #200 (which was when I originally planned to publish this), and that strip was the final one. Think you can find the others? Only 190 possibilities.
Rock on, guys, and never stop drawing.