Three Australians and three Maori on a train

Three Australians and three Maori's are travelling by train to a
Rugby match at the World Cup in  England .  At the station, the three
Aussies each buy a ticket and watch as the three Maoris buy just one ticket between them.
"How are the three of you going to travel on only one ticket?" asks
one of the Aussies. "Watch and learn  bro," answers one of the Maoris
They all board the train. The Aussies take their respective seats
but all three Maoris cram into a toilet and close the door behind them.
Shortly after the train has departed, the conductor comes around
collecting tickets. He knocks on the toilet door and says, "Ticket
please."
The door opens just a crack and a single arm emerges with a ticket
in hand. The conductor takes the ticket and moves on.
The Aussies see this and agree it was quite a clever idea. So after
the game, they decide to go one better on the return trip and save
some money (being clever with money, and all that).
When they get to the station for the return trip, the Maoris buy a single
ticket for the return trip. To their astonishment, the Aussies  don't buy a ticket at all!!
"How are you going to travel without a ticket?" says one perplexed
Maori.
"Watch and learn  bro ," answers a Aussie .
When they board the train the three Aussies cram into a toilet and
soon after the three Maoris cram into another nearby.  The train
departs.
Shortly afterwards, one of the Aussies leaves the toilet and walks
over to the toilet where the Maoris are hiding. He knocks on the door and says, 
"Ticket please."