Japanese culture is very obssessive about teaching people to not eat on the train. So why do I have Pringles* potato chip crumbs in my pockets tonight? Some unruly high school girls sitting next to me on the train were loudly chatting as they stuffed Pringles into their mouths earlier this evening.
All the train commuting rules are suspended for those that ride the train car I happen to be in.
In cross-cultural studies, this is my Dweeb Corollary. It states that the examples/models we use to judge a culture are often the abnormal members of that culture. When one visits a foreign land, the non-mainstream people often gravitate toward the visitor. So our information-collecting and analysis functions are skewed.
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* clarification: we all know that Pringles are not potato chips; they are made of compressed parts (like particle board) that come from those who were not chosen when the real potato chips were choosing teams