“Another unary photograph is the pornographic photograph (I am not saying the erotic photograph: the erotic is a pornographic that has been disturbed, fissured). Nothing more homogeneous than a pornographic photograph. It is always a naive photograph, without intention and without calculation. Like a shop window which shows only one illuminated piece of jewelry, it is completely constituted by the presentation of only one thing: sex: no secondary, untimely object ever manages to half conceal, delay, or distract… A proof a contrario: Mapplethorpe shifts his close-ups of genitalia from the pornographic to the erotic by photographing the fabric of underwear at very close range: the photograph is no longer unary, since I am interested in the texture of the material.
The presence (the dynamics) of this blind field is, I believe, what distinguishes the erotic photograph from the pornographic photograph. Pornography ordinarily represents the sexual organs, making them into a motionless object (a fetish), flattered like an idol that does not leave its niche; for me, there is no punctum in the pornographic image; at most it amuses me (and even then, boredom follows quickly). The erotic photograph, on the contrary (and this is its very condition), does not make the sexual organs into a central object; it may very well not show them at all; it takes the spectator outside its frame, and it is there that I animate this photograph and that it animates me.”
Roland Barthes, Camera Lucida: Reflections on Photography
(Barthes, Roland. Camera Lucida New York: Hill and Wang, 1981.)