Something abstract existing in thought or as an idea but not having a physical or concrete existence. Visual geometry containing the non-explicit description of sexual organs or activity. Arising in the mind it intends to stimulate erotic rather than aesthetic or emotional feelings.
An interesting article about Christian themed pornography. "...from what I can tell, most modern crucifix fucking is heavily influenced by this seminal piece of vintage pornography from the 70’s, where two priests tie some teenage chick (slut) to the bed, burn her with holy water/acid and watch her fuck herself with a crucifix while she whispers dirty little nothings like, “your mother sucks cocks in hell.”