Question: "What is a succubus? What is an incubus?"
Answer: According to medieval folklore, a succubus is a demon that takes the form of a woman in order to have intercourse with a man in his dreams. The name comes from Old Latin, and means “to lie under.” In Islamic superstition, there is a similar demon called the qarinah or karina, and in ancient Middle Eastern cultures Lilith was the night demon's name. Whichever name is used, the essential qualities are the same: a demon who tempts men sexually at night and who tries to kill infants at birth.