The Four Sons
One afternoon, Moshe, David, Nathan and Daniel, four students at New York University, are drinking coffee in Moshe’s room. Suddenly, Moshe puts down his cup and shouts, "Oy!"
David then puts down his cup and shouts, "Oy vey!"
Nathan then puts down his cup and shouts out, "So nu?"
On hearing what his three friends have been shouting, Daniel gets up and starts to walk towards the door. "Where are you going, Daniel?" the other three ask him.
"Listen," he replies, "if you don’t stop talking about Israeli politics, I’m leaving!"