I'd heard that Japanese women would flush the toilet repeatedly to hide the noises of their bodily functions in public restrooms.
The problem was so severe that
high-tech toilet makers began installing a noise making function that would mimic the flushing sound so that women would stop wasting all that water.
I thought this had to be exaggerated. Maybe a few neurotic Japanese women did this but surely most ladies were more secure.
I work as an ALT at three different schools. 2 elementary schools and 1 junior high. I am the ONLY female teacher that does not flush the toilet to mask body sounds. EVERY other teacher does. EVERY ONE.
gaijzilla.com