In millions of homes in Europe and the United States, the mistletoe is hung up at Christmastime. According to a happy custom, when a girl is standing under the mistletoe, a man is allowed to kiss her.

Curiously enough, the use of the mistletoe on holidays and ceremonial occasions goes back to quite ancient times. When the Romans invaded Britain and Gaul (now called France), the people who lived there were called Celts. These Celts were organized under a strong order of priests called Druids.