I like it when new technologies think of the future of man and the planet, which benefit human life. Although it sounds a bit funny and even grotesque, it is true: how much paper do we need just to wipe our butts? How many trees die just to keep our asses clean? In some countries they have chosen to use only soap and water, but if there is this ecological proposal that does not harm our environment, perfect. Be aware before it's too late! That it will be useless to have a clean ass if we run out of oxygen. Good hunting