Joe stopped at his favorite watering hole after a hard day's work. He noticed a man next to him order a shot and a beer. The man drank the shot, chased it with the beer and then looked into his shirt pocket.
This continued several times before Joe's curiosity got the best of him. He leaned over to the guy and tapped him on the shoulder.
"Excuse me," he said. "I couldn't help but notice your little ritual. Why in the world do you look into your shirt pocket every time you drink your shot and beer?"
"There's a picture of my wife in there, and when she starts lookin' good, I'm headin' home!"