Showers are magical think-boxes. A day can be planned, a problem can be solved, a deep philosophical question can be answered. However by the time you clean up, dry off, and make yourself presentable to the world most of those thoughts can fade off forever.
With the Waterproof Doodle Book you have a safe place to store all of your genius thoughts.
Or you can leave funny doodles for your significant other. That works too.