Why do people kiss under the MISTLETOE?

The European mistletoe, as a parasitic plant growing on deciduous trees, was seen as a symbol of the continuing 'life-force' (and vitality/fertility) of the tree through the winter, and was sacred to the Celts. The fertility image was completed by European mistletoe's shape and form. Druids would hold a special ceremony for any mistletoe found growing on a similarly sacred oak. Such a plant could be cut only with a golden sickle on to a white sheet - if it touched either earth or iron the magic powers would be lost.

richmondparkchurch.org.uk an evangelical pentecostal church in Boscombe, Bournemouth, Dorset, UK.