Shot Of Whisky

A guy walks into a bar and orders a shot of whisky. He gulps it down and peeks into his shirt pocket. He orders another shot of whisky, gulps it down and peeks into his short pocket. He orders a third shot and does the same thing. After the sixth shot, he asks the bartender for the bill, pays and starts to walk out.
Curiosity gets the better of the bartender and he says to the guy, "Excuse me, but I noticed that every time you drank a shot, you kept looking into your pocket. I was wondering what's in your pocket."
The guy slurs, "Well, I have a picture of my wife in my pocket. I keep drinking until she starts to look good."