Three CYS and three Turks, are travelling by train to a conference.
At the station, the Turks each buy one ticket and watch as the CYs buy only a single ticket between them.
"How are three people going to travel on only one ticket?" asks one of the Turks. "Watch and you'll see," answers one of the CYs.
They all board the train. The Turks take their respective seats but all three CYs cram into a restroom/toilet and close the door behind them.
Shortly after the train has departed, 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 Turks saw this and agreed it was quite a clever idea. So after the conference, the Turks decide to copy the CYs on the return trip and save some money. When they get to the station, they buy one single ticket for the trip back.
To their astonishment, the CYs don't buy a ticket at all! "How are you going to travel without a ticket?" says one of the Turks. "Watch and you'll see," answer the CYs.
When they board the train the 3 Turks cram into a restroom and the 3 CYs cram into another one nearby. The train departs.
Shortly afterward, one of the CYs leaves his restroom and walks over to the restroom where the Turks are hiding.
He knocks on the door and says,..... "Ticket, please." ....