If I can get you to laugh with me, you like me better, which makes you more open to my ideas. And if I can persuade you to laugh at the particular point I make, by laughing at it you acknowledge its truth.
John CleeseWe all operate in two contrasting modes, which might be called open and closed. The open mode is more relaxed, more receptive, more exploratory, more democratic, more playful and more humorous. The closed mode is the tighter, more rigid, more hierarchical, more tunnel-visioned. Most people, unfortunately spend most of their time in the closed mode.
John Cleese