World's Worst Cultural Mistakes
Knowing Your Right from Your Left
What’s Offensive: Many cultures still prefer to eat using traditional methods—their hands. In these cases, food is often offered communally, which is why it’s important to wash your hands before eating and observe the right-hand-is-for-eating and the left-hand-is-for-other-duties rule. If you eat with your left hand, expect your fellow diners to be mortified. And when partaking from a communal bowl, stick to a portion that’s closest to you. Do not get greedy and plunge your hand into the center.
What You Should Do Instead: Left-handed? Attempt to be ambidextrous—even children who are left-handed in these cultures are taught to eat with their right hand—or at least explain yourself to your fellow diners before plunging in.
From the article World’s Worst Cultural Mistakes