Don’t learn from crooked ways. 

 3 economists went into a train with just one ticket. 
 When it came for the time for collecting the tickets they all rushed into one toilet. 
 When the ticket man came he knocked in the toilet and said `ticket please’, they passed the ticket under the toilet door and he took it, tore and passed it under the door. 
 The next 3 lawyers who had seen what happened bought just one ticket and funny enough the 3
 economists didn’t buy any ticket.

So when it came for the time of the tickets the 3 lawyers all rushed into one toilet. They heard the same `ticket please’. 

 They passed the ticket under the toilet door, but funny enough the ticket didn’t come back. 
They opened the door to find the economists with the ticket and rushing into a toilet

HERE YOU HAVE THIS STORY TURNED INTO A SHORT DRAMATIC SKETCH