Dorm Rule #1: Never leave the door unlocked to your dorm room when you go away on vacation. If you do, your friends will take advantage by either filling it with balloons/condoms/newspapers or redecorating it with penis drawings of all different shapes, sizes and colors.

Luckily for the poor resident of this room, his friends were “nice” enough to paste large sheets of blank paper on the walls before scribbling all over them. However, don’t think for a second that normal friends, those who are under stricter time constraints, won’t simply write on your walls, leaving you to scrub them with soap for weeks to get all the flaccid dongs off of them.

Still, this guy now has quite the Herculean task set forth before him, because as you can imagine, it’s going to take him hours to rip through and clean up the resulting mess left behind by this endless ocean of phallic Christmas paper.

Can you imagine how much time, energy and money were spent making this prank happen? Sure, the payoff was worth it, but man, these friends spared no expense and really, really wanted to pull one over on this guy—for, well, leaving a door unlocked.