Use them incorrectly and you’ve performed the Eastern equivalent of putting your elbows on the table and chewing with your mouth open. o help avoid those faux pas, we consulted a group of experts and asked them to share a few basic protocols. Heed this advice. Not only will it help you save face. But it'll also help you avoid pissing off slumbering ghosts.
http://www.thrillist.com/eat/nation/things-you-re-doing-wrong-with-chopsticks-chopstick-etiquette