I just can't imagine shaving in a Y washroom. I want to spend the absolute minimum amount of time in that contraption and the though of using it, say 10 hours into a transpacific flight, to shave is repugnant to me. Think of all the people in the previous 10 hours with standard wet floors , filthy sink etc. I feel like throwing my shoes away just walking in and out of it.

Sorry, I will hold it as long as I can to avoid that lavatory and spending extra time in there shaving and primping...ain't gonna happen.