The rabbits are in a tussle for love. They both want grooming, and so they lowered their faces to the ground. It is a challenge to see who can be closer to the ground. The rabbit who gets the face closer to the ground wins and gets groomed.
No, you love me first.
You love me first, look, my face is closer to the ground".
Blackie lost, and has to groom Whitty, who is really very naughty about grooming Blackie in return.
Ok, ok, let me groom both of you.