This is how it will start

You will strip; while I watch.
You will touch yourself; allover, erotically; while I watch.
You will lie face down; legs spread; invitingly.
I will stand behind you; as naked as you are.
I will reach forward; place my hands on your shoulders.
I will caress my hands down your back; leisurely.
Your breathing will quicken; panting, nearly gasping.
My hands will reach your waist; your hips.
I will grip your hips; raise them; your ass in the air.
Your buttocks will be before me; soft, supple, yielding.
I will kiss your butt cheeks; first one, then the other.
I will bite them; my teeth, marking them, claiming them.
My fingers will part your lips; first one finger, then two, three.
They will fondle your clit; petting, stroking, arousing.
I will feel your wetness; running slowly down your thighs.
I will force my fingers deeper; spreading you.
Your hips will wiggle; wriggle, squirm, writhe.
You will be prepared, for my taking.
My shaft will have risen; stiffened, thickened, swollen.
Then I will begin.