When my rabbit was alive he believed we should “share the petting”. By this I mean I would scratch him behind the ears for a few seconds then he’d be like, “your turn!”, and lick my hand for a few seconds. After he decided that was an equal amount of petting for me, he would stop and stick his head under my hand like the rabbit in this video. I could not skip his turn by simply putting my hand under his mouth, he would just stick his head under my hand until both my hand and his face was touching the floor. Then there would be a standoff. If I wouldn’t pet him, he’s leaving.