There is a very big difference between some implied sex and explicit sex and profanity. As a parent, I have the right to not have my child read that. A few years ago one of my daughter's was "required" to read a book (don't remember the name) and the first few pages were filled with profanity and taking God's name in vain. I contacted her teacher and told her my daughter was not reading that book. She gave her an alternate choice that I approved of and nothing more was ever said about it. I did not try to tell the teacher none of the students could read the book, just that my child wasn't going to.
You definitely have that right. I just have a problem when a certain group of people want the book banned for everyone. They should provide an alternative choice for anyone who wants it.