We have one really effective weapon, and that is laughter

Can I start my presentation by telling a joke? This question comes up frequently. Especially since we frequently read about this type of advice on the web. The problem is that it is the people who already know how to use humor in front of an audience who give this advice! If you start telling jokes because you have been advised to do so, it can be very dangerous; while by simply learning to smile more you won’t be taking any risks.

To reread: