In the kingdom of Bhutan they have a very special function for images of penises.
Bhutan is a small kingdom in the Himalaya in between China and India and to ward of evil spirits the whole country decorates their houses with an image of a penis. This is a custom that was also practiced in the Roman Empire where penises were also painted near the entrance of a doorway to make sure no evil crossed their threshold.
Momentarily the people of Bhutan are going penis mad as it soon will be the inauguration of the new king and they want to make sure only good will come to him.