There's an art to it. A real life guide from Japanese television about watching the O'Reilly Factor, and how to avoid the worst consequences:
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http://www.theatlantic.com/daily-dish/archive/2007/06/surviving-your-own-farts-in-japan/227407/
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http://www.theatlantic.com/daily-dish/archive/2007/06/surviving-your-own-farts-in-japan/227407/
