"Compulsion" joke

A man walked into a bar and ordered a glass of white wine. He took a sip of the wine, then tossed the remainder into the bartender’s face. Before the bartender could recover from the surprise, the man began weeping.
“I’m sorry, ” he said.
“I’m really sorry. I keep doing that to bartenders. I can’t tell you how embarrassing it is to have a compulsion like this. ”
Far from being angry, the bartender was sympathetic. Before long, he was suggesting that the man see an analyst about his problem.
“I happen to have the name of a Psychoanalyst, ” the bartender 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 bartender, and left.
The bartender 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 bartender asked, serving the glass of white wine.
“I certainly did, ” the man said.
“I’ve been seeing the Psychoanalyst twice a week. ”
He took a sip of the wine. Then he threw the remainder into the bartender’s face.
The flustered bartender wiped his face with a towel.
“The Doctor doesn’t seem to be doing you any good. ” He sputtered.
“On the contrary, ” the man claimed,
“he’s done me world of good. ”
“But you threw the wine in my face again! ” The bartender exclaimed.
“Yes, ” the man replied.
“But it doesn’t embarrass me anymore. ”