Zogg from Betelgeuse: Crash Course for Aliens

Earthlings 101 - Social Mechanics - Bonding, Gratitude and Karma (1x7)

Air date: Sep 23, 2012

What is a greeting? Why do earthlings greet each other? What do words like "Please", "Thank you" or "Sorry" mean? What is gratitude? What is the trade of a beggar? What is karma? Why is international karma trade big business? What is a sofa? And why does the question "What is a sofa?" appear in the description of a video about social mechanics?