I have decided that Hoi An water is possibly the softest in the world.  The tiniest amount of bodywash on my scrunchies is like having a bubble bath - it takes ten minutes to sluice off all the froth.   And one of those shampoo sachets which airlines hand out - that does two washes easily, so much lather does it make.

In addition, I think this must be one of the most pollution-free environments too.   With only mopeds, electric bikes and cycles on the street, there is no emission problem.  Each shop and business organises a kerbside fire, in a firebucket, every night as they close up, to dispose of the day's rubbish, and our dustbin is emptied with thrice weekly regularity and presumably sent off to burn somewhere.

Although chickens and dogs wander freely, at least in residential streets, I have never seen dog or chicken poo anywhere.  Pavements are swept each morning by the businesses they front, and the park is hosed each day.   You never see litter in the streets, even though vegetables are sold on the roadside.  Plastic bags are given out with gay abandon, but none blow in the breeze where you walk.
Most mysterious, and gratifying