The infamous "bum gun" in SE Asia.
That's because USA people believe that if they got poop on their hands, wiping it with only paper would clean it off.
Why do you bring up hands?! Well, that is what is left on your ass when you wipe it with paper. I guess you can't see (or smell) it unless you're super flexible, so that makes it ok.
FYI, you can buy and install a simple bum gun in 10 minutes for about $15-20 off Amazon. They are great, I don't even buy TP anymore. Still wet? Use a small towel to dry off.