Actually, this isn't a horny real rabbit seeking robo rabbit love.

Rabbits lay their head low in a demand for grooming. The inferior rabbits will realize that they must groom their superior and consent. So in rabbit thought, if I put my chin on the ground it's because you're only good enough to clean me and hope that someday I'll clean you back. If I feel like it.

In other words, biological beings exert their dominance over mechanical beings beyond the human/robot scale. Success!