Never Whistle At Night
Source: http://poetrydispatch.files
People whistle for a number of reasons, but the most common ones are when you’re trying to occupy yourself, or you want to express a favorite song without actually singing it, or when you’re feeling happy and wants to express it. Well, if you’re in Korea, better think of something else to express yourself. Don’t whistle, especially at night, as this is believed to summon the creatures of the night like ghouls and ghosts.