Incubi and succubi, these being the plural, are most likely not high ranking minions of Satan. I conclude of their rank because they are common gender selective entities. I choose not to use the word demon because it is not used in the Bible. The term devils are used most often in the King James version of The Bible for the helpers of Satan.

Incubus is the masculine and are attracted to have intercourse with females while they sleep or dream. This would make succubus the feminine and they are attracted to have intercourse with males while asleep or dreaming. Incubus are probably the most dangerous because folklore tells us that these entities can father a child with a human woman. They are noted by their cold penis and the succubus by their cold vagina. Merlin, the greatest wizard of them all was said to be fathered by an Incubus. A true spiritualist may have an Incubus or Succubus, depending on their sex, as their spiritual guide. They will be guided well as long as they are true to their devil lover and do not seek sexual gratification from an actual human. This can be extremely dangerous because it is said that prolonged sex with an Incubus or Succubus can be detrimental to the health even to the point of death.

So if you think you are having repeated sexual dreams and the penis or vagina is unusually cold........BEWARE!!!!!!!!!!!!!