After years of research, I have finally managed to discover that the south Asian fascination for white skin comes from a longing for cleanliness.
You see all those Harpic ads on TV right? What happens? There is a dirty "not white" loo, and then use use Harpic and then it is cleaned by now being rendered "sparkling white." The human skin is constructed in a similar fashion. When it is dirty, it's "not white". When it is clean, it is white.
So why not covet the clean things in life? I mean the white things? White skins, white armpits, white pussies, a whitey white world is all we need to solve all the health and hygiene problems of the problems of the world. It's simple logic really. Never mind the myriad rubbish heap which is the high street.