When nature calls and we need to go to the toilet, many Australians do it without even considering that it means we are rich and privileged.
About 2.6 billion people (or 40% of the world's population) living in the world's poorest countries, cannot go to a safe or hygienic toilet, says the UN.
They go to the toilet wherever they can and the unhygienic conditions causes diarrhoea, which is the second biggest killer of children aged under five, with 4000 children a day and 1.4 million a year dying from the disorder.
In East Timor - just a few hundred kilometres from Australia's north - it is the biggest killer of children under five.
Hundreds of people queued before a giant toilet prop in Melbourne's Federation Square on Saturday to start a global campaign that will involve thousands of people from 61 countries, ahead of World Water Day on Monday.
The events aim to make a Guinness World Record for "the world's longest toilet queue".
WaterAid Australia policy and campaigns head James Wicken said the organisation was urging Australian Foreign Affairs Minister Stephen Smith to go to the first ever high-level meeting on sanitation and water in Washington with the UN Children's Fund (UNICEF) on April 23.
"We are not convinced yet that they are going to send bureaucrats of a level high enough," Wicken said.
"We know how to do it, people need safe toilets and safe water to wash their hands in so it doesn't cause health costs."
In a WaterAid statement, Australia's parliamentary secretary for International Development Assistance, Bob McMullan, said: "Without access to clean water and proper sanitation people cannot lead healthy, fully productive lives and communities and countries cannot develop."
On World Water Day on Monday, the UN General Assembly in New York City will debate water and sanitation ahead of the April UNICEF meeting.
