The agony of a pooping Indian kid on foreign land !!

I was reading an article on office humour and it triggered a recall of the agonizing experience of an Indian kid at Changi Airport in Singapore last year. His story .. this kid with troubled bowels rushed straight out of SQ409 and ran into one of Changi's famed scented toilets to his relief. A few groans and sighs later, the kid who felt at home, came happily out with his trousers at his knees calling for his mum with panic. Reason - there was a startling discovery that he made after pooping "Where's the darn water tap !!". Well, mum was a first timer as well and joined the frantic search for the elusive water tap. It was a while before help arrived from me who sensed that they have been having "issues with tissues" that I directed them to the right closet with a hand-wielded faucet. Ok now ... don't go over board with your skewed imagination folks .. I didn't clean him up, his mum did !! I could thereafter see the kid beaming and zipped-up, and ready to confidently take on the day at Singapore.

I have been irked about this farcical practice in many friendly countries about .. why the whole body undergoes a wash at bath, why hands are rinsed after a peek, why faces are cleansed after a sneeze, but why the forlorn bum alone is spared the trouble of a wash after a poop !! In good humour, can anyone give me an answer please.