The Barber Shop

This 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 2 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 2 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."