No seriously, as a kid that was raised in a small town of a rural area in Spain there were times I was too far from home to rush back to take a dump. So I had to use whatever was at hand to wipe my butt.
So I thought Spain was more civilized, even back in the dark ages. All those Roman baths and magnificent architecture, and you're still using rocks, grass, leaves, and sand to wipe?
Please be a good boy scout here when you go off the trail. You can always scape a little dirt over your pile.
Also, I hope the new toilet gizmo has about a five year trajectory to becoming the standard toilet.