You'd think the average grad student at Harvard would know how to use the bathroom by now, wouldn't you? Well, just to be on the safe side, Harvard's Graduate School of Arts and Sciences hands out a "bathroom etiquette guide" to all incoming students moving into university-owned housing, which is conveniently divided into what is considered "appropriate" and "inappropriate" behavior when you're using the toilets, showers and sinks. A sample is below. Prepare to be stunned.