Hanging up mistletoe dates back to the Druids, who thought it brought good luck and had healing properties. Today, hanging mistletoe in your house during Christmas symbolizes vitality, fertility, and romance. The tradition of kissing under the mistletoe is said to have originated in England in the 1700s and became a popular Christmas custom after it was illustrated in 'A Christmas Carol' published in 1843. The rest, as they say, is history.