Why do authors use such silly titles as "Lord of the Rings"? There is no mention of it anywhere in the paper besides the title, it just looks childish(to me). J

Why do authors use such silly titles as "Lord of the Rings"? There is no mention of it anywhere in the paper besides the title, it just looks childish(to me). Just use the second part of the title as the paper's title, dump the LoTR thing.