Everyone has their own dividing line for this, contingent on factors that are unique to them, and unique to the creator in question. Mind you, I personally think it’s good to give some serious reflection as to why some particular creator has crossed that line for you, on the grounds that it’s always good to know why you think or do anything.
A sweet I-work-at-a-bank-type guy once asked me if I’d read Tom Robbins. Well. I’d just left my complete Robbins collection (minus Still Life With Woodpecker) on my brownstone’s stoop because my new bookshelves couldn’t accommodate it. I’d sped through all his novels on high school beach trips. Unlike the book my mom gave me in lieu of explaining sex (Are You There God? It’s Me Margaret, by Judy Blume), Robbins’ novels—Woodpecker, in particular—made sex sound fun. I might never read Jitterbug Perfume again, but Woodpecker, definitely.