Most of my book titles aren't selected just because they grab attention or suit the book, but also because they sometimes make a statement that I think is relevant. It might say something about human nature, the world we live in, or be a belief that I have about the world.
I'll let you be the judge. Here are a few titles to consider:
Do I have to explain this one?
Isn't there a 'bad' side to all of us? Do we not all have a dark side?
In essence, we are all animals. Do we not have natural instincts that relate to those of animals? Are people all that different from one another?
A quote throughout the series is; in a world full of sheep, always be a wolf. That seems pretty relevant in our times.
In the end, I guess it depends on the author's style and motives. Maybe they want a silly title that shows a lighthearted side to their writing. Then again, they might want something dark that suggests murder, crime, or horror. For me, my motive as a writer is to make people think. I guess I feel that if I can't get them to read the book, maybe I can accomplish this (to some degree) by demonstrating my titles.