A guy sticks his head into the barbershop 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 get a haircut?"

The barber looks around the shop full of customers and says, "About two hours."

The guy leaves.

A week later, the same guy sticks his head into the shop and asks, "How long before I can get a haircut?"

The barber looks around the shop an says, "About an hour and half."

The guy leaves.

The barber looks at a friend in the shop and says, "Hey, Bill, follow that guy and see where he goes."

A while later, Bill comes back into the shop laughing hysterically.

The barber asks, "Where did he go when he left here?"

Bill looks up and says, "To your house."