Ill start. When I was back in school we had a common room for our year which contained a small room with a door with nothing in it. Day by day a friend and I drew one small penis on the walls in the small room. As the days went on we grew more adventurous, the dicks began to grow in size, and instead of limiting ourselves to one a day, we were drawing three maybe four. Soon our inner artistic selves came out and the dicks started to adopt extra features, like maybe an extra testicle or head. The walls were starting to fill up with a patchwork display of different penises, and other people in our year started to notice. Again as the weeks passed, the dicks were upgraded adding more to each piece, I remember one penis I drew was flying through the sky with a little stick man with a top hat riding on top of it. We kept this pattern up for about 2 months, and the people who noticed started to join in, also drawing dicks on the walls of the small room as if it was some sort of rite of passage. After a couple more weeks (the process was sped up thanks to the extra members) the entire room was a masterpiece dick collage. I mean there was dicks on the walls, floor, ceiling and back of the door. Some teachers had noticed by this point and had appropriately named the room 'The Cockpit' but had no idea who the culprits were. With no more room left on the walls of 'The Cockpit' we decided to continue our art out in the main room, were there was a canvas about 20 times the size of the first to cover in phalluses. Unfortunately as soon as we started the new project we got caught, so the fun ended. Yeah looking back it was pretty immature.