Every kid if told how northern hemisphere toilets flush counter-clockwise, and southern hemisphere toilets (and buckets, drains, and such) flush clockwise. But it’s not true at all. There is a thing called the Coriolis Effect, which DOES make some thing make some things do in different directions. But that works on a MUCH larger scale. For things such as hurricanes. As far as the toilets go, they are going to flush whichever way they are designed to flush.