Jesus creates a mental cartoon in Luke 5:34 “Can you make wedding guests fast while the bridegroom is with them?”
Ha! Of course not! It would be totally inappropriate! People lining up at the table filled with all that good food with arms folded, frowns pasted to their faces, and every plate shinning clean with their pitiful reflections.
You do not find that people at wedding parties have dull faces. It is uncharacteristic. We do not expect it.
Cartoons cause laughter when they picture the absurd. Can you visualize Jesus laughing out loud as he responded to criticism that his disciples were not dull enough?
Sources on laughter:
Elton Trueblood, The Humor of Christ
Karl-Josef Kuschel, Laughter, A Theological Reflection