One thing you can count on from much of general market (code for secular) literature is profanity and graphic sex.
Let me just say I understand the use of profanity. I don't like it. Am not a fan of it. However, if it's used minimally and at the perfect timing from a character who would be expected to exclaim these words or one that simply loses it for a moment, then at least it fits the story. It rarely offends those in the world so strictly from the standpoint of authenticity, it figures that profanity would appear in these books.
Graphic sex is a no-go for me. I can see zero reasons for defining how foreplay and sexual intercourse are explicity portrayed other than to titillate a reader which is equivalent to pornography. Creating the visuals with words might seem "hot", "sensual", or any of the other words on a cover which elude to the sex act being visibly enacted on the pages of these "steamy" stories, but it's nothing more than writer porn.
Both profanity and graphic sex can take away from a good story. Used in excess, they can definitely detract from the plot, distract from the real story, and simply be used as a ploy to potentially ignore other weaknesses in the book.
Both profanity and graphic sex serve a story better when eluded to other than writing a textbook description of foul words and various sexual antics.
Those are my thoughts on the uses of profanity and graphic sex in fiction.
Father, humankind has perverted your beautiful act of love and created words to rage and rant. Forgive us, Lord. We're desperate for you whether we know it or not. In the Name of Jesus, Amen.