Ah, I see! You are "the Incubus"; a demon that preys on a creature's lust to gain control over them. Your harem, all kept within your "Delight", is made up of many females who desire only for your company and attention. You have many ways of granting newcomers some pleasurable experiences. Your twin sister, the Succubus, also lives in this castle.
I won't keep you any longer. Who knows when someone new may arrive?