Watch and learn

[BigRog]

George and Laura Bush and Bill and Hilary Clinton are traveling by train to the Super Bowl.
At the station, George and Laura each buy a ticket and watch as Bill and Hilary buy just one ticket.
"How are the two of you going to travel on only one ticket?" asks George W, astonished at what he is seeing.
"Watch and learn," answers Hilary.
They all board the train.
George and Laura take their respective seats but Bill and Hilary cram into a toilet together and close the door.
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 it and moves on.
The Bushes see this happen and agree it was quite a clever idea, so after the game they decide to try a similar plan on the return trip.
When they get to the station they see the Clinton's at the window buying a single ticket for the return trip.
To their astonishment, the Clinton's see that the Bushes don't buy any ticket at all.
"Aren't you taking a terrible chance by traveling without a ticket?" says Hilary.
"Watch and learn," answers Laura Bush.
When they board the train the Bushs cram themselves into a toilet and the Clinton's cram into another toilet just down the way.
Shortly after the train is on its way, George W. leaves their toilet and walks over to the toilet in which the Clinton's are hiding.
George W. knocks on their door and says, "Ticket, please."