Toilet Art

Bare walls above toilets bother me. Why must taking a piss be such a boring experience? It would be nice if there were no bare walls above toilets, but what would you place above a toilet? What type of art suits such a space? It is such an intimate space, a space of privacy. I believe it should be something thought provoking, but with incredible simplicity. The bland walls bother me, I am going to seek out something appropriate to place in that barren space.