Three construction workers, an Irishman, an Italian and a Jew, are building a skyscraper. They're sitting on a beam having lunch when the Irishman takes out his sandwich and says, "I can't believe it! My wife gave me another goddam roast beef sandwich. If she does this again I'm going to jump off this building!"
The Italian takes out his sandwich and says, "Tuna! For God's sakes, I hate tuna. If my wife gives me tuna tomorrow I'm going to jump, I swear!"
The Jewish guy takes out his lunch and says, "Egg salad! Dammit, if I find one more egg salad sandwich in my lunch I'm going to jump off this building!"
The next day, the Irishman takes out his sandwich, sees that it's roast beef and says, "Enough's enough!" and jumps.
The Italian guy takes out his sandwich, sees that it's tuna, and says, "That's it, I've had it!" and jumps.
The Jewish guy takes out his sandwich, discovers egg salad, and says, "I can't take it anymore!" and jumps.
Soon after, reporters go to the wife of the Irishman. She says, plaintively, "If he had only told me he didn't want roast beef, I would have made him something else." The Italian's wife, in tears, tells reporters, "He should have just told me he didn't want tuna! Why didn't he tell me?"
The reporters go to the Jewish guy's wife, who says, "I don't understand that man. Everyday he makes his own lunch."