In my line of work, as in life, things of a lewd nature creep up from time to time. I spent one day replacing every fucking with fuckin’ in a certain character’s dialogue to better convey his Scottish brogue. I quite enjoyed that one.
Then there was the author who had written about a young girl who fisted in her dress. My eyeballs skidded to a halt. Sure, I realized that she curled up her tiny hand into a ball inside the pocket of her dress. But using fist as a verb requires an object; you must fist something, and such an action is not appropriate for a young lass. I flagged the sentence with a query that described the technicality, further explaining that the action word carries a vulgar connotation even if that wasn’t the intention.
Now is a good time to point out that the copyeditor’s credo was established long before the MTA inserted it into their subway ads: if you see something, say something.