I read somewhere that gorillas have an unusual habit. Being that they are vegans, their diet consists of plant material. When they need to evacuate, gorillas tend to use the expelled waste material as food. I also read that dogs return to their vomit, goats eat trash and pigs love to wallow in mud. Chimps are cannibals. They eat other smaller monkeys.
I have observed also that civilized humans have similar tendencies. Throughout the eras, they have invented new and complex ways to screw over and kill off one another and themselves.
You would think we would learn by now…?
Hooray for being part of the dominant species! Woohoo!