Another Double

A guy walks into a bar and orders a double shot of bourbon. He downs it then reaches into his pocket and pulls out a picture. He stares at the picture for a moment then puts it away and orders another double. After downing that drink, he proceeds to pull out the picture and examine it before putting it away and ordering another double.

This goes on for about 4 rounds of drinks before the bartender asks him what's going on. "Well," the guy says, "This is a picture of my wife. When she starts to look good, I'm going home."