Not that many because most of the world uses water and flush which is far cleaner. But it seems Westerners think their society is so superior, that they haven't

Not that many because most of the world uses water and flush which is far cleaner. But it seems Westerners think their society is so superior, that they haven't figured this out this one simple trick yet. In the West I have to go through meetings knowing how unclean everyone's bottoms are /s