In reply to Cheese Monkey:
That's what struck me too. In fact, during my cultural research before visiting India I did get to wondering why they assume that that everyone attends to their personal hygiene left-handedly.
Due to natural reticence I've hesitated to conduct a survey on this but... am I unusual in not having left-handed wiping programmed in during infancy?
I am fairly ambidextrous and usually eat and drink left-handed, which I had to remember not to do in India. I didn't really want to get into a discussion about why the practical underpinnings of this convention didn't apply to me.