It seems that in Japan, ladies are very keen on covering up any “bathroom sounds” when they use the restroom, for they find them very embarrassing. It seems that they would repeatedly flush toilets, wasting a lot of water, in order to mask these sounds, so this clever device, the Otohime was invented. You wave your hand in front of the sensor and voila out comes the sound of flushing water. Apparently it is a very popular device. I am not surprised, because apparently, a large percentage of Japanese women never fart in their husbands presence after marrying them, EVER.
*Via Boing Boing
“Magical Water Princess/ Otohime”