Based off my other thread where someone mentioned keeping a textbook on the toilet tank.
What (if any) literature do you keep in the lavatory? I generally cycle through Onion collections and/or comics collections (Foxtrot, Calvin & Hobbes, etc). There's also some old copies of Discover and Popular Science that can be disposed of at this point.
As an aside, my mother hates the idea of people reading in the bathroom and thinks it to be very uncouth.