So this has been something that has been on my mind lately, but I haven't had the time to post about yet. I have actually had this conversation with David, another teacher in the program, and he also noticed these things. I will try to find pictures to illustrate my points, but that might take some time.
Have you ever noticed that toilets are different around different parts of the world?
First off, you have our good old American toilets. Their major defining characteristic is the whirlpool flow of the water when you flush: