There are a few accounts of household demons in Mediterranean folklore. Infernal creatures, they are born and borrow the characteristics of inhabitants. The best known belong to the hearth, to fire and are the incarnation of the air breathed by the mistress of the house. A house with many chimneys and a lot of smoke is an ideal home for these domestic demons. Some own the hanger and the library, others live under the bed. When other tenants move into the house, new demons appear. The intergenerational fights between demons create misunderstandings in the home, illness, quarrels and pale and joyless children. Merchants’ demons are long, with huge claws, while those of farmers are rather bony, but with a deadly bite and almost no tail. There is no peace between them. The vast majority of them prefer the night, but the demons of priests and prostitutes are beautiful and sensitive and do not shy away from a certain coquetry. They are the only ones who can have blue eyes and a mane of blond or red hair often shines on their backs. But their ringlets hide claws, which can lift a lamb into the air, and canines able to sink into wood. The marks on the doors of the houses they live in undeniably show what these hard steel teeth are like.
If they are banished from the house by a triumphant demonic group (and this can only happen because of poor organisation at the hands of the demon-artists), the damage caused to the tenants is commensurate. Possessing no wings, they cannot fly, but their hinds legs, small in their natural state, can lengthen so much that, on full moon nights, they insatiably urinate on first-floor balconies or even through a window forgotten open by a maid in love.
From the consciousness of living with demons, the Middle Ages likened various human acts to demonic possessions. Acts such as reflection or the cult of image that modernity recovered in the name of reason as artistic acts.