In South Korea, it is considered bad luck to sleep while what is on?

For many years, South Koreans believed that sleeping with an electric fan on with the doors and windows shut could kill you. While that is not at all true, the conspiracy persisted long into the 21st century, but the superstition has now become one of bad luck instead of death.

Asked by Ben Jenkins · Last updated 2 years ago · 5.6K views