intelligent Santa

Perwez Musharraf and his wife are travelling in USA when they meet Santa Singh who is also travelling with his wife on a holiday.
They start talking and realise that both are going to take the same train the next day. At the station Perwez buys tickets for himself and his wife. However he notices that Santa Singh buys a single ticket.
"How are two people going to travel on only one ticket?" asks Pervez.
"Just watch and youll see!" answers Santa.
They all board the train and the Musharrafs take their seats and watch as Santa and his wife cram into a nearby restroom and close the door. The train departs and shortly afterwards the conductor comes around collecting tickets. He knocks on the restroom 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 Musharrafs see all this and agree that it is a clever idea to save some money. So on their return trip, they decide to copy the Singhs.
They purchase a single ticket for the return trip, but to their astonishment, the Singhs do not buy even one ticket.
"How are you going to travel without even a single ticket?" says Musharraf.
"Just watch and youll see!" answers Santa.
They again board the train. This time the Musharrafs cram into a restroom and the Singhs cram into an another restroom nearby. Shortly after the train moves, Santa leaves his restroom, walks over to the restroom where the Musharrafs are hiding. He knocks on the door and says, "Ticket, please