Coriolis
Bob,
Everything down here is different! The reverse gravitational effect also affects banana growing. Bananas grow with the bend the other way. This has proved to be a problem when selling bananas overseas. So with the ingenuity of the government, and some sophisticated science tehcnology, they solved the unemployment problem.
So, if you're unemployed, they double your benefit, if you will go and work in the banana bending factories up in Queensland. Works real well, and you get paid a fortune for bending the bananas to the other way, making them more acceptable to an international market.
However, dunnies are different. That's the "coriolis affect", and you need a system as large as a hurricane to get the twirling to go the other way round. Dunnies? Nup.... its just straight down the gurgler.