A guy opened the barber's door and asked the barber how long he has to wait for a hair cut. Being a busy day, the hairdresser looked around and responded: "About two hours." The guy left in a hurry.
Few days later the same guy entered the barber shop and asked again how long he has to wait for a hair cut. Being a crowded day again, the barber looked around and answered: "About three hours." And again, the guy left in a hurry and did not come back.
Few days later the same story repeats.
The barber, already curious, asked his disciple Ben:
“Ben, follow the guy and see what on earth is he doing.”
Ben obeyed and run after the guy. He was back in twenty minutes.
“Well,” said the barber, “where did this guy go after he left?”
Ben, all smiles, replied: “At your house.”