It's Friday morning on the Lower East Side of Manhattan and outside Sol's kosher deli, one man walks over to another, slaps him hard on his back, and says, “Shalom Rosenberg, it's nice to see you again.”
The slapped man angrily responds, “Oy, have you got the wrong person! My name isn't Rosenberg. And in any case, what's the idea of hitting me so hard?”
“It's your business how hard I decide to hit Rosenberg?” replies the first man.