hm, I guess I've been socialized to think it's normal ... in some obvious sense it's weird, but no more weird than us thinking of pets as morally the same as humans, for example - we anthropomorphize and project things onto objects and animals that aren't there, we read intention where there is none, etc. - so in the same way we project our human experience of gender onto non-human animals. In some sense that feels entirely natural and consistent with other human tendencies. But yeah, it's weird when we examine it the right way.