I can remember the days when people going to Paris had to be instructed how to use the street pissoirs....
Interesting that this article doesn't tell the students how to make do with cleaning themselves without the absence of the hygenic hose spray (or at least the kettle of water) found in many Middle Eastern toilets - many people find the use of toilet paper primitive and prefer to clean their backsides with water and the left hand.
This reminds be of my BIL's experience during his time in the Middle East when the British sergeant was telling the local recruits how to use a WC. The toilets were constantly being blocked with sand, as the locals wiped their bottoms with sand. Sarge said "you do what you have to, then wipe your bottom with paper". This didn't do down well at all, and it was found that the WCs were blocked worse that ever, because the locals were wrapping the soiled sand in the toilet paper and flushing the whole parcel.....
It is cultural - it's what people are used to, or not used to. I found using a squat toilet extraordinarily difficult, especially if in more primitive places there was nothing to hang onto it - and in one delightful location, said water-hose was just that - a length of black hose...