Well, to contract the whole discussion: Anthere states we must be able to ban dirty pictures that are irrelevant, Gregory considers this "censorship" and states that the pornographicness of a picture is a subjective appropriety, which goes counter to the objectivity claim of the project.
Ladies and gentlemen, have you ever been taught in scientifical method? If so, you must know that objectivity is an illusion. If there is an autonomous reality at all, we always view it through coloured subjective veils. Extreme attemps to objectivity and apersonality will lead to no knowledge at all. We imply have to accept that and deal with our common sense both in daily life and in science.
Thus: what we should allow on Wikipedia and its sisters and what not depends on conventions. If most people think pictures considered pornographic are not at home, than we must delete them.
Now more concrete on the picture itself: If there is an encyclopedic article on a sexual topic in which a picture of someone doing a blow job on himself is or might be relevant, then we must maintain the article, otherwise we shouldn't, because it can only be abused. The case is that simple in my view. (Correct me if I'm wrong, I am a relative newbe...)
Thanks for reading this, Wouter
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