Bidet's aren't as common as splash-back around here.
When I returned from Japan, having lived with a heated, bidet-toilet combo I thought I'd never get used to using just paper again! Conveniently Kleenex and Sorbent came out with a range of wet wipes at about the time I got back.
I remember going to Thailand to visit some Thai friends who had gone to uni with me in Tasmania. They told me how dirty Australians were because we did not have hoses in our toilets to wash our bums.
I think arse-etiquette is quite interesting, and I'd never sack anyone for having a clean bum.