about 2 years ago I did a work trip through Argentina and Ecuador. The only place I've ever seen a bidet was in Argentinian Hotels and I suspect they didn't work. They were a separate unit next to the toilet, I didn't (and still don't) understand how I was meant to use them but when I "turned them on" the spray that came out was feeble... would not have reached my arse, nowhere near it.

I'm still curious about them, but my experience of them has left me nonplussed about the concept.