And I took the opposite point of view. That a sentient species would be possibly similar to us in many ways, but socially everything they did would be absolutely alien to us. In the same way that a male human, glueing peacock feathers on his ass would earn odd looks from the opposite sex, rather than offers to mate.

The model of the behavior that I wrote through demonstrated something akin to our sense of humor+joking+laughter. It was a deliberate and obvious telling of a lie concerning the size of something. When the alien jokester had done a good job the listeners would respond by making a buzzing sound by forcing air through lips pressed tightly together (similar to "raspberries").

It did not get written because (as is usual for me) I could not come up with a plot that I liked enough to hang my ideas around.