Sources:
4) https://en.wikipedia.org/wiki/Succubus
5) https://www.urbandictionary.com/define.php?term=Succubus
6) https://mythology.net/demons/succubus/
7) https://www.britannica.com/topic/incubus
Key Points:
(4) Lilith was Adam’s first wife, who later became a succubus. She left Adam and refused to return to the Garden of Eden after she mated with the archangel Samael. In Zoharistic Kabbalah, there were four succubi who mated with the archangel Samael. The four original queens of the demons were Lilith, Eisheth, Agrat bat Mahlat, and Naamah.
Succubi collect semen from men they seduce. Incubi, or male demons, then use the semen to impregnate human females, thus explaining how demons could apparently sire children despite the traditional belief that they were incapable of reproduction.
The succubus is also known as the earth wanderer, and she seeks her victims by disguising herself as a young, beautiful woman, seducing men.
(5) Succubi prey on emotionally weak men and steal their souls through sexual activity. They use the collected soul fragments to gain power and enslave more men. The four pillars of a succubus entity are Lust, Greed, Gluttony, and Selfishness. Succubi use psychological warfare to enslave men.
(6) Smart, sexy, and potentially deadly, the Succubus is not a demon to be underestimated. She is a powerful seductress who loves nothing more than to toy with men, and although she might seem fun at first, you wouldn’t want to make her angry!
The ancestors of today’s Succubi, on the other hand, had personalities as nasty as their looks. They were sneaky, controlling, and malicious. Despite being sex-crazed, they had no interest in pleasing men. Instead, they used sex for their own purposes—to please themselves, to corrupt the pious, to gain life force, or even to have children!
(7) In medieval Europe, union with an incubus was supposed by some to result in the birth of witches, demons, and deformed human offspring. The legendary magician Merlin was said to have been fathered by an incubus.
Summary.
Although the Succubi have many differing theories, there is a common theme amongst most. Succubi are demons or devils whose job it is to corrupt men through sexual activities, by taking on the form of beautiful women, for their own purposes.
Incubi and Succubi are opposite genders of the same demon or devil.