I love the way he has naturally come into being just a little bit ruthless during sex.

Pulling in my head so I choke down the length of him.

Holding me down lightly, encircling my windpipe with his great breadth of fingers.

Grabbing a fistful of my hair so I cannot move.

I have an inkling, a small idea, to loop my robe belt around my throat while he's fucking my ass from behind.  I can feel his elbow balancing on my back as he slowly twines the fabric into his fist, leading me up to be flush against his torso.  I imagine his other hand coming up to knead and pluck at my nipples.  His breath in my hair, his lips grazing my jaw when I desperately crane backwards to kiss him.

Yes.  I have an inkling.