"Professor, why on Earth is there a writing desk in the bathroom?"
"Why, for writing on, of course. Why else would a writing desk exist?"
"That's not... but why is it in the bathroom, of all places?"
"Why wouldn't it be in such a place of meditation? Genius may strike at any moment, and especially at those moments where there is little distraction. And it is well to write down one's ideas while they're still fresh, so that they don't become muddled or forgotten. Have you ever tried to take notes on a sheet of bog paper?"