"Nnng.. Johnnnnnn...." Sherlock fucked hard and fast between John's cheeks, a fine sheen of sweat dotted his brow..

"Ahhhhh!!!" He threw his head back and came, splattering himself between John's arse, and up the bottom of his back. He kept rocking for a few moments afterwards, then finally, totally spent, he grunted and rolled back over onto his back, panting for breath.