Thanks for the longer explanation, but I'm not sure I am seeing a real difference between what you are describing and what censorship effectively is. You want to edit out parts that the author clearly found important enough to include in their published version. That to me is censoring (or, when asking the author to do it, maybe self-censoring?).

Now, if you want to ask the author to write a PG13 version of their story because that's what you want to read/hear, then it's up to them, clearly. But except in those cases where the pr0n is added on (and I know there are writers who offer different versions, so I know that for some people the sex really is not an intricate element of the narrative and characterization but sexy lagniappe), I'm not sure writers would want to do that to their story (or have it done to them).

I wonder if you could make an analogy to translation, where someone else authors a new version of the text and yet...I've gotta check with the fanfic translators I know if they delete sections or tone down things...that might be a useful analogy?