“A clown is like an aspirin, except it works twice as fast,” said Groucho Marx. That said, let's recognize that putting in a good mood when everyone is already laughing is good, but it's a bit like offering chocolate at the Nutella festival:at best it's useless, at worst, glurps, excuse me, where is the toilet? It sickens. On the other hand, offering Serrano ham at the cheese festival, so there, what a success! So let's stop with our culinary metaphors and observe our American friends who do so well to place the right word when you least expect it. For example, while the smallest seminar will welcome you with a "Hello and thank you all for having traveled 457 km by autoberth to join us at Formula 0 in Arcachon", in the United States, you would be served with a " Dear friends, brevity, as I explain on page 572 of my speech, is indeed the soul of wit And there you have it… The famous “opening joke”… Let's use it at will:at the start of a speech or with a client, it will be defusing, de-stressing and… generating an aura. Whether we are a gynecologist, a florist, a chick breeder, its success will depend more on the discrepancy with the context than on its humorous level. Otherwise, we would be part of the Jamel Comedy Club, we would not keep operating accounts or do pap smears.