The fact is, I have already discussed why there's no need or call to discuss the cornucopia of kinks other than to help someone know from all the rest of us that it's normal to like, really be into sniffing smelly socks or whatever, and that can be accomplished by a book on the shelf on the library.
My biggest question for all the parents who would object to reference material on the observed divergence of the human sexual condition is if they really actually want their kid to grow up unable to ask his perspective sex partners if they're into having them sniff their feet at an appropriate stage in pursuit of a relationship, as if they want them to live in a world where when the discussion is broached, they are laughed at or scolded rather than simply answered, allowed to be either happy or disappointed, and step forward to ask the next person (or not, as needs dictate).
Learning how to have healthy social and yes sexual relationships requires understanding that certain things are a lot more normal than a teenage peer group may be aware of.
That involves having open access to books, and, yes, teachers that will answer their questions honestly and openly as appropriate, and explain through the reasons inappropriate questions are not answered.
If parents are up in arms about access to information that keeps people safe and delays the onset of shared sexual behaviors, they can BE up in arms until they get over it.