"Is there any science-fiction pornography? I mean something new, an invention by the human imagination of new sexual experience? Science fiction alters at wll the coordinates of space and time; it can set effect before cause; it works within a logic of total potentiality - "all that can be imagined can happen". But has it added a simple item to the repertoire of the erotic? I understand that in a forthcoming novel the terrestrial hero and explorer indulges in mutual masturbation with a bizarre, interplanetary creature. But there is no real novelty in that."

George Steiner.