In England, mistletoe at one time was placed over the doorways for good luck. They believed that only happiness could pass underneath the mistletoe, therefore, enemies would hug and seal their peaceful intentions with a kiss of friendship. Just like the reason the wedding ring is put on the now known "ring" finger is that it was believed the finger was directly connected to the heart and if your fiance's love was not true when you put the ring on,.... your heart would skip a beat.  old belifes that now customs