Constant laughing, smiling, joking, and goofing around

If anyone knows a lot about the Inuit people and their social customs, then perhaps you can shed some light on their social behavior.

In the movie, the Inuit are constantly laughing and joking at each other, pretty much what we might term, 'playing grab a$$' all the time.
They often refer to each other as, stupid, and modestly critique themselves as worthless and stupid too.

My belief is all this laughing, joking, goofing around serves to defuse tension, anger, and hostility, especially when people are forced into close proximity during the long, harsh winters. Perhaps we all can learn something from the Inuit, to laugh more at our own mistakes and errors as well as others instead of becoming angry and resentful.