"Huhng...!" John made a garbled sound in response to the deep bite, knees wobbling with each apologetic swipe of tongue following it. He could taste the possessiveness in the back of his throat, like it was in the air and in Sherlock's mouth and ringing in his ears.

John pinned their tangled hands together up against the wall with a loud "thunk," curling over the detective as best a man of his height could, head canted to the side to allow the exploration of teeth and tongue to continue on his neck even as he dragged his fingers against Sherlock's thigh, marking in turn with lightly scratching fingers. Mine. Just as much his as he was Sherlock's.

"God, you extraordinary thing..." He muttered, half dazed and through kiss swollen lips.