How to save your self when going at girlfriend's home.....

A guy stuck his head into a barbershop and asked, 'How long before I can get a haircut?The barber looked around the shop full of customers and said, 'About 2 hours.'The guy left.A few days later, the same guy stuck his head in the door and asked, 'How long before I can get a haircut?'The barber looked around  and said, 'About 3 hours.'The guy left.A week later, the guy stuck his head in the shop and asked, 'How long before I can get a haircut?The barber looked around the shop and said, 'About an hour and a half .The guy left.The barber turned to his friend and said, 'Hey, Bob, do me a favor , follow him and see where he goes. He keeps asking how long he has to wait for a haircut, but he never comes back.'A little while later, Bob returned to the shop, laughing hysterically. ? ?
The barber asked, 'So, where does he go when he leaves?'Bob looked up, wiped the tears from his eyes laughng -,'Your house!"