Those are the folks that are most likely to offend. I'm not sure why we are, as a nation, so hung up on sexuality. I read hundreds of books when I was young and I can't say one that tipped me away. I just liked it because it was the real world around me in print.. before the interwebz and if you're worried about a book in the library now , then I have some bad news for you.
People who have a problem with that now are just sounding the alarm on themselves. They need to control their victims by preaching morality while they steal their innocence. I have no quarter for people like that.