>>714005331>killingProtecting territory and getting rid of pests is crucial to survival. It can be avoided but if you're guarding your livestock or family from a violent predator then you may find yourself killing animals, even when you don't eat them.
>eatingDon't absolutely have to do this but we're omnivores and meat is an important source of protein. It's a necessity if you can't find other food sources.
>fuckingUnsanitary, unnatural, unnecessary. Having sex is supposed to have the purpose of procreation, fucking an animal instead of a human is pointless because you can't impregnate it no matter how hard you try.