You would think that people would know how to use a toilet, but in some countries they don't use toilets. I remember in Korea we had to teach our new Korean
Augmentees how to use the toilet. They were used to squatting over a hole, so when confronted with the toilet, they would stand on the seat and squat and shit all over the back of the seat. I confronted this
phenomenon again in Iraq, apparently Iraqis also squat and don't know how to use a toilet, they also wipe their ass with their bare left hand.