|A succubus is a demon in female form, or supernatural entity in medieval folklore that appears in dreams and takes the form of a woman in order to seduce men, usually through sex. A succubus may take a form of a beautiful young girl but closer inspection may reveal deformities of her body, such as bird-like claws or serpentine tails.|
Folklore describes the act of sexually penetrating a succubus as akin to entering a cavern of ice. During the time when succubus lore was created, any sexual activities that were not purposefully procreative were considered a sin. The succubus may well have been used as an excuse for men to retain their faith.
In some stories a succubus collects semen from the men she seduces. The incubi or male demons then use the semen to impregnate human females.