Thread:Nick tanico/@comment-25999031-20150214200552/@comment-25113070-20150214200934

no one knows exactly as there is no cannon history on the matter, but she managed to infuse them with succubus demonic energy which gave them their human female forms, ability to turn women into more of thier own kind and to use the spirit energy from men to increase thier strength.

this now is just fan based speculation, but we reckon that her doing this, killed all of the male monsters of all of the other species, where as succubi were a female only race, they increased their numbers by using human men as males, or by turning human women into more of thier own kind.