I'm not much of an "arse" fan either. It sounds so harsh and insulting, and isn't nearly as nice as the American "ass", or (as someone else mentioned) the always cute "bum".
Globes is a big pet hate of mine, so I think I won't be looking for any boccaccio stories today
Then there's slut and whore. These words are great when they're used in the right place (say, when one character is referring to another and being mean or derogatory), but I don't really like stories where it feels like the author picked "slut" because he's angry at women rather than because it fits the story.
Any cock that's described as "fearsome".
Oh, and "Gor". That's like, a major and humungous alarm bell for me. Gor was bad enough when John Norman did it, and I shudder to think how much worse it can get when online writers of dubious talent have a go
RAllan