I was at a party one day and suddenly a friend ran up to me hollering, “HEY”, then he kissed me! That took me by surprise. Good thing he was a friend.
You may have guessed this was a holiday party, and I was standing under a sprig of mistletoe. I did not know people still followed that tradition, but it started me thinking about mistletoe in general.
The kissing tradition probably developed because it grew up in the air, in the trees, without obvious means of getting water.
Read all about mistletoe legends from all over Europe.