Okay my two cents worth. I have a greeting that I love and insist upon in private, it goes this way. She kneels with knees apart then goes down to put her bottom on her calves. Then she leans forward while slowly placing her arms out and back like a bird or seraphin. When her face makes contact and her nipples are touching the floor she says words like welcome Master your slave awaits your desire. Then she is to raise back to a kneeling position then to an arched back with mouth open waiting for me to decide if I will let her taste me.

To some this is humilation but most find that once they get past that their sub is in full control.