A succubus is a demon from Hell that occupies a female body. 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.
The physical form of the demon is a small animal about the size of your palm with 4 stumps for legs and a human head that resembles a woman. They don't manifest in any other way save for their true form and you must invite on onto you directly or indirectly.
The succubus wants to make love or have intercourse for one reason: to reproduce using human semen. What happens is the demon climbs onto the male penis and then lays down on it like a dog or cat lays down and then using what could be its genitals to send intense signals of pleasure on the most sensitive parts. To put it simply, it feels amazing. The demon does this to cause a very productive ejaculation (from an intense orgasm) then takes the semen and then impregnate its self, then has a litter which is also succubi and then the matriarch or mother demon orders her offspring to attack the host to speed up the draining of life force and kill the host. Its most of the time fatal.
Many succubi enter their host via an immensely strong link between a man and a woman’s soul. Interestingly, the male prey can save a portion of his soul by evoking a satanic chant to sever this link permanently. Although it is not recommended and is extremely dangerous, as it leaves the males soul vulnerable to demonic possession as well. The male version of a succubus is called an incubus and the same definitions apply.
According to the Kabbalah and the school of Rashba, the original three queens of the demons, Agrat Bat Mahlat, Naamah, Eisheth Zenunim, and all their cohorts give birth to children, except Lilith. According to other legends, the children of Lilith are called Lilin.
According to the Malleus Maleficarum, or "Witches' Hammer", written by Heinrich Kramer (Institoris) in 1486, 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. Children so begotten were supposed to be those that were born deformed, or more susceptible to supernatural influences. While the book does not address why a human female impregnated with the semen of a human male would not produce regular human offspring, an explanation could be that the semen is altered before being transferred to the female host.
However, in some lore, the child is born deformed because the conception was unnatural.
King James in his dissertation titled Dæmonologie refutes the possibility for angelic entities to reproduce and instead offered a suggestion that a devil would carry out two methods of impregnating women: the first, to steal the sperm out of a dead man and deliver it into a woman. If a demon could extract the semen quickly, the substance could not be instantly transported to a female host, causing it to go cold. This explains his view that succubi and incubi were the same demonic entity only to be described differently based on the tormented sexes being conversed with. The second method was the idea that a dead body could be possessed by a devil, causing it to rise and have sexual relations with others. However, there is no mention of a female corpse being possessed to elicit sex from men.