The slave kneels, bending at her waist she places her cheek to the floor. Taking the Master's right foot she places it upon her neck, her arms sweeping behind her,crossing at the wrist against the small of her back.

Book 21, page 409
"There are many ways to perform obeisance. "I said.
"I am a free woman," she said, " I know none of them."
"I shall instruct you briefly in three," I said. " First kneel before me , back on your heels, yes, with your knees wide, wider, your hands on your thighs, your back straight, your breasts out, good, your belly in, good, and now lower your head in deference, in submission."~
"Now that," I said, " may not be exactly a form of obeisance, for authorities do not all agree, but for our purposes we shall count it as one. It is, at any rate, a beautiful position, and it is, certainly, a common position of slave submission."
"Now" I said, "and this is clearly a form of obeisance, bend forward and put your head to the mat, the palms of your hands on the mat. Good. Now lift your head little and come forward, substantially keeping the position. Forward a little more."
"But then my face will be at your feet," she said," My lips will be over them!"
"Yes," I said, "Good, now, put your head down and lick and kiss my feet."
"I am a free Woman!" She Said.
"You are a woman," I said," now softly lingeringly, and lovingly, Good."
"I am not a slave," she said.
"All women are slaves, "I said "Imagine what this would be like if you were truly a collared slave."
She gasped.
"Now" I said, "for a third form of obeisance. You may belly to me."
"I do not understand," she whispered.
"There are various forms of bellying, " I said, and bellying may be suitably and pleasingly combined with other forms of floor movements, approaching the Master on all fours, turning to your sides and back, writhing before him, and so on. We will take a very simple variation, suitable for an ignorant free female who has not yet even begun to discover the depths of her sexuality."
She looked up at me.
"On your belly," I said.
She backed off a bit , and went to her belly. her hair was before her face, as she now on her belly before me looked up at me.
"Now inch forward," I said, " remaining low on your belly, and when you reach my feet, once again, as before, lifting your head a little, tenderly and humbly, and beautifully, as though you were a slave , lick and kiss them. Good. Good. Now take my foot and place it gently on your head. Very good. Now place it again on the Mat, and kiss it again. Good. You may now belly back a little, humbly. I have not yet given you permission to rise of course."