It seems like you may be referring to "succubus" instead of "subcubus." A succubus is a female demon or supernatural entity that is often depicted as seductive and engaging in sexual relations with men in their sleep. The counterpart to the succubus is the incubus, which is a male demon that visits women in their sleep. These concepts have been present in various cultures and mythologies throughout history and have been explored in literature, art, and popular culture.

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