When Shuichi and Kokichi shower together, they have shaving cream wars. AKA, while Shuichi is showering Ouma gets a handful of shaving cream and slaps it all over Shuichi's face, then Saihara retaliates with his own shaving cream attack and then the two end up not even getting clean. Instead, they throw shaving cream at each other until they slip and fall down laughing in the shower. It's fun to say the least!