Pornography is an abstract phenomenon. It cannot exist without a medium to propagate it, and it has very little (if anything at all) to do with sex. The relationship between pornography, which is entirely fictional and sex, which is very real, very sweaty and mostly not a very aesthetic thing is something like the correlation of science-fiction literature and technological innovation: sometimes the ideas are bizarre, completely nuts and would never work without a Heisenberg Compensator - but sometimes some fragment lasts and is taken to the real world.
