I suspect that a few people may have imbibed a bit too much "Xmas cheer"!

Anyway, to introduce a non-mystical note, the hemi-parasite Mistletoe (Viscum album) grows mainly on 'man-made' hybrid trees such as Common Lime and Apple. It rarely grows on Oak (sorry to all those of a druidical inclination!). One of my greatest heroes of all time, the late Prof. Oliver Rackham (God rest his soul), once stated that in prehistoric Britain it was probably more frequent on Hawthorn. Indeed, I have seen it growing on Hawthorn on a Cambridgeshire nature reserve. Last year there was great excitement when some of my botanical colleagues found it growing on American species of Hawthorn, planted as street trees, outside of a Greater Manchester shopping centre!

Sorry for the diversion - couldn't resist. All of those churches, that won't allow it across their thresholds, don't know that they're missing!