So wait, I'm sorry if I am perturbed by this...but do we have a definitive answer Eric? i looked up your question, but alas...it eluded my querying skill. I read once that this is not true but in fact a myth...on the always so reputably quoted wikipedia...it was on a rather entertaining...52? (or more) commonly accepted myths...highly recommend a google...but i digress to my further point...whats the word around the world? tell you what... i have a so called "toilet" as we stateside call them when we wish not to intone slang...ill flush mine and tell you the direction, Prospective southern hemisphere scientific collaborator, and you, rinse, repeat. and we can call the wasted water a sacrifice for the good of science. what say you?