John claimed Sherlock's skin with his mouth, licking and nipping a path from the younger man's bare chest to his long neck and finally latching onto Sherlock's mouth with his own. Sherlock returned the kiss with teeth and tongue, all the while thrusting against John's hand. He could feel John's own hardness against his thigh. Suddenly he wanted to feel every reaction John had, including the pulsing of his cock. Sherlock nudged his leg in between John's in the hopes that John would begin to thrust against his thigh.
"I don't think so," growled John. He stepped back slightly and tugged down on the shirt, pulling Sherlock closer into the wall. He found Sherlock's taunt nipple with his mouth and Sherlock's vision blurred. As John continued sucking and nibbling on the sensitive nub, he undid Sherlock's belt and trousers. He slid them down and over Sherlock's cock, letting them drop to the floor on their own. John slowly teased the head of Sherlock's cock, sliding his thumb in slow circles.
Sherlock was panting, gasping, writhing; never before had he experienced anything like this. He couldn't bear how slow John seemed to be going.
"John, PLEASE! I can't—-"
John had dropped to his knees, keeping the shirt firmly twisted in one hand and Sherlock's cock in his other. He began to explore the sensitive areas of Sherlock's groin with his mouth. Slowly stroking Sherlock, John used his tongue to trace the delicate skin of Sherlock's inner thigh. He continued upwards to just above the hip bone before sucking hard at the soft indentation. Sherlock moaned and bucked into John's hand. Nibbling in a straight line across Sherlock's toned belly, John stole a glance up and almost lost it. Sherlock was looking down at him eyes wide, mouth open, and there were no other words but "wanton lust" for what John saw.