Travel query

In many Asian countries, the tradition is to eat with your right hand as the left is used to wipe your arse when you’re finished having a ****. Each to their own.

But having used more than my fair share of loo-paper-free toilets, I have one query resulting from this:

If you use your left to wipe, why to they always have the sink/tap/water bowl/hose on the right so you can’t wash your left hand under it?

Now if you’ll excuse me, I have a decent wodge of poop to extract from under my right index nail. Anyone have a toothpick?