The Succubus (Succubi pl.) is a seductive night demon that visits men in their sleep in order to copulate with them. During the intercourse she robs the man of his sperm and renders him impotent. One tale goes that the succubus will steal the semen of a man and the Incubus will steal the ova of a woman and the two will mate in order to produce more demonic offspring. A child borne of a Succubus and an Incubus is called a Cambion. Another version of the Succubus is the Night Hag, which does pretty much the same thing as the Succubus, only instead of being bewitching beautiful, she is hideously ugly.
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