You're saying the world is wrong because that is the globally accepted definition, except by the deranged (which happens to include you).
If we wanna get really nerd-technical here, in most places in the world, legally speaking, pets are considered property, and as such, cannot actually be "raped" anymore than say a cardboard box or a computer monitor.
Not that beastiality is morally acceptable, but legally speaking, it isn't actually considered rape in most places; even though common sense would dictate otherwise.