After another couple of moments of letting his hand wander, while he continued to lick and suck at John's entrance, his hand finally, finally came up to John's cock, rock hard, deep red and flushed with arousal, and leaking.

He used a bit of the leaking precome to slick his hand and stroked, agonizingly slowly at first, barely moving up and down the shaft, only enough to tease, to take a bit of the edge off, not nearly enough to make him come.. not yet. He would try to draw that out as long as he could.

"Mmm.." Sherlock hummed, his mouth still against John. "So nice." He rumbled, letting John feel the vibrations of his voice again.