On the subject of "toilet humour" . . .

. . . there's this.

China Dispatch: Using the Squat Toilet

Rule One: Exhaust all other possibilities.

If you are truly in need and condemned to use the squat toilet, comfort yourself with the knowledge that you are several thousand miles from friends and family. No one has to know.

Proceed as follows:

Most stalls do not have toilet paper. This is the best time to realize this. Either take paper from the general dispenser in the bathroom area or preferably bring your own as it will be made of tissue and not plywood carpaccio.

It gets much, much worse.

Link courtesy of "Da Wife", who clearly isn't planning a trip to that part of the world in the near future.