It took every single bit of Sherlock's willpower tot not thrust himself forward and impale himself fully inside John's hot, wet mouth. He made do by tightening his grip in John's hair, his fingernails leaving little crescent shaped marks in his scalp.

"Johnnnnn.. Ahhh.." He said in a whispered hiss. He was already rocking to John's movement, trying to match the up and back motions, fucking into his mouth. He was chasing the pleasure, could feel it building inside of him, he knew he wouldnt last long, he knew he needed to give a warming before the inevitable end that seemed to be rushing up to meet him.. soon.. so soon.