Demons and Humans Having Relationships Demons are drawn to having sex with humans sexually. The main work of the Kabbalah, The Zohar ("Book of Splendor"), states that any contamination of semen results in the birth of demons, including having sexual relations with night terror demons like LILITH. Incubi, or demons in the form of human males, prey on women, while succubi, or demons in the form of females, prey on men.