An Irishman came home unexpectedly and found his wife in bed with his best friend.

He was so distressed that he rushed to the drawer, took out a revolver and pointed it to his head.

"I can't take this," he cried.
"My wife and my best friend in bed together. I'm going to shoot myself".

At this, the wife began to laugh.

"I don't know what you're laughing at," said the Irishman.
"You're next."