Marieke is right...you need to know your audience when you tell a joke. That's true for understanding age, experience, culture, etc. A true comedian finds jokes that the specific audience will laugh at, not be insulted by. In the heterogeneous groups, of which Marieke has described, it's very difficult to find humor to satisfy everyone. And by the way... Political Correctness? What about being nice? That's not fake... that's wanting the other person to enjoy the experience, too.