A Japanese tourist comes to Sydney and checks into a hotel.
On the first morning he comes down, hands over 10,000 Yen and asks the receptionist to convert it to Australian Dollars. She gives him $150 Australian, according to the exchange rate.
He says: "Ooh, bery good, bery bery goood exchange rate..." and goes off and blows it on stuffed koalas and boomerangs and crap.
The next morning he comes down and gives the receptionist 10,000 Yen again. This time she only gives him A$120, again according to the exchange rate.
He says: "Ooh, bery bad, bery bery bad! Why yesterday you give me One-hundred-pipty and today you only give me one-hundred-twenty!"
She says to him: "That's the exchange rate for you. Fluctuations mate."
He says: "Well Fluck You Too, you Bitch!"