Females not liking people hear them pee is a common taboo in Japan. Some of their electronic toilets even have a setting to cover the noise (thus saving water). As with everything, it's become a fetish at some point.
It's much like how women in the west don't like to show their unshaven legs or pits, but in some other countries, it's fine and none cares. But then some people develop a fetish for hairy women. Go figure.
And abuse, whether it's from a man or a woman, and whether it's physical or psychological, is a crime.