Seen in a book review:

[elfs]

Quick, what book series is this man reviewing, and (extra credit) what analogy is he making?

Consider for a moment the fact that no sane parents would give their children books which portrayed a set of "good" pimps and prostitutes valiantly fighting a set of "bad" pimps and prostitutes, and using the sexual acts of prostitution as the thrilling dynamic of the story.