World's Worst Cultural Mistakes
Where It’s Offensive: Hawaii.
What’s Offensive: Refusing or immediately removing a lei.
What You Should Do Instead: Leis in the Hawaiian Islands aren’t just pretty floral necklaces that you get when you check into your hotel or show up at a luau. They’re a centuries-old cultural symbol of welcome, friendship, and appreciation. Never refuse a lei—it’s considered highly disrespectful—or whip it off in the giver’s presence. If you’re allergic to the flowers, explain so, but offer to put it in some place of honor, say in the center of the table, or on a statue. Note that closed leis should be worn not hanging from the neck, but over the shoulder, with half draped down your chest and the other half down your back.
From the article World’s Worst Cultural Mistakes