A guy sticks his head into a barber shop and asks, "how long before I can get a haircut?"
The barber looks around the shop and says, "About two hours." The guy leaves. A few days later, the same guy sticks his head in the door and asks, "how long before I can get a haircut? The barber looks around at shop full of customers and says, "About two hours." The guy leaves.
A week later, the same guy sticks his head in the shop and asks, "How long before I can get a haircut?" The barber looks around the shop and says, "about an hour and a half." The guy leaves.
The barber looks over at a friend in the shop and says, "Hey, Bill, follow that guy and see where he goes". In a little while, Bill comes back into the shop, laughing hysterically.
The barber asks, "Bill, where did he go when he left here?" Bill looked up and said, "to your house."