A succubus (pl.: succubi) is a female demon or supernatural entity in folklores who appears in dreams to seduce men, usually through sexual activity. According to some folklore, a succubus needs semen to survive; repeated sexual activity with a succubus will result in a bond being formed between the succubus and the person; and a succubus will drain or harm the man with whom she is having intercourse.
In modern representations, a succubus is often depicted as a beautiful seductress or enchantress, rather than as demonic or frightening. The male counterpart to the succubus is the incubus.