Perhaps I'm just a fuddy-duddy (see also: old fogey, curmudgeon, stodgy, prematurely aged, grumpy, square, the man), but I firmly believe that bathroom time and cell phone time should never mix. For example, the following conversation, which I have been forced to overhear twice already this semester, should never occur:
"Hey, what are you doing?"..."Oh, I'm peeing."
"Hey, what are you doing?"..."Oh, I'm peeing."