The restaurant patron with a compulsion

A man entered a restaurant and ordered some food and a glass of water. He took a sip of the water, then tossed the remainder into the waiter's face.

Before the waiter could recover from the surprise, the man began weeping. "I'm sorry," he said. "I'm really sorry. I keep doing that to waiters. I can't tell you how embarrassing it is, it's a compulsion."

Far from being angry, the waiter was sympathetic. He suggested that the man see an analyst about his problem. "I happen to have the name of a psychoanalyst," the waiter said. "My brother and my wife have both been treated by him, and they say he's as good as they get." The man wrote down the name of the doctor, thanked the waiter, and left. The waiter smiled, knowing he'd done a good deed for a fellow human being.

Six months later, the man was back. "Did you do what I suggested?" the waiter asked, serving the glass of water.

"I did," the man said. "I've been seeing the psychoanalyst twice a week." He took a sip of the water. Then he threw the remainder into the waiter's face.

The flustered waiter wiped his face with a towel. "The therapy doesn't seem to be working," he sputtered.

"Oh," the man claimed, "it's working great."

"But you threw the water in my face again!" the waiter responded.

"Yes," the man replied, "but it doesn't embarrass me anymore."