Wikipedia is not censored for minors. However, we tend to pick the best image for a situation. In the case of [[Clitoris]], there's a very strong case for this involving, well, the clitoris. In the case of [[autofellatio]] there's a good case.
I'm not convinced that a screen capture from Titanic is the best image for [[Kate Winslet]] - for one thing, Leonardo DiCaprio is in that shot. Then again, the picture is in [[Titanic (1997 movie)]], not in [[Kate Winslet]]. And there I think the picture is considerably more reasonable - it is a major scene in the film.
What is neither reasonable nor helpful is when these discussions turn into endless referendums on boobies. The fact that Wikipedia will contain boobies, as well as other naughty bits, is pretty much evident. The general and philosophical polemics are not helpful. The relevant question and discussion is whether the image is the best choice FOR A GIVEN ARTICLE. And that discussion, surely, is better suited to, oh, say, the article talk page than to the mailing list.
Really. We don't need to come running here every time we see a nipple.
OMG NIPPLE!
-Snowspinner