"DEDUCE THIS", John yelled, grabbing Sherlock's face, pulling him down, and smashing their lips together. The detective responded instinctively, nipping the shorter man's lip, running his tongue along the seam, then pushing it in, exploring the doctor's mouth thoroughly. Stunned, John allowed him to do as he wished, before seizing the opportunity, reaching up and tangling his fingers into Sherlock's dark locks, touching his tongue to the raven-haired man's cautiously, letting out a low "Mmm" of appreciation. Sherlock responded, taking John's tongue into his mouth, he sucked on it: first gently but, after hearing a groan from him, Sherlock became more aggressive, biting on John's lower lip, and dominating the kiss, not that shorter man minded. After a few long moments, they broke apart panting.
Sherlock smirked, reaching up to pull John's hands away from his head, pleased when the fair-haired man seemed reluctant to comply. John's lips were red, his face was flushed, his eyes were ever so slightly unfocused, and his knees seemed to have a bit of trouble keeping his body upright . Sherlock celebrated, internally of course.
Then, the consulting detective calmly walked away.
After a few moments, John seemed to recover enough to think coherent sentences. Then, he yelled after the retreating figure. "YOU PLANNED THIS ALL ALONG, DIDN'T YOU?!". The figure paused, midway up the stairs, "Deduce this," Sherlock purred. Here, he paused for emphasis, then continued up, swaying his hips for added effect, "I'm going up to your bedroom."
John's eyes widened, he almost fell over himself in his haste to catch up to the detective.
"I'd be happy to"