John began to sit up.
"No, Sherlock, you don't have to feel obligated to-"
"I want to, John. Relax." John stared uncertainly into those blue eyes. "I'm a fast learner." A smile played with Sherlock's lips.
John realized just how true this was, and was suddenly nervous for an entirely different reason. A warm palm pressed against John's chest, pushing him back onto his back, and Sherlock kissed him.
It was still a very odd feeling to be feeling this foreign urges, and even more odd to be giving himself over to them, but Sherlock was honestly enjoying it more than he cared to admit.
Since John was still a little tense, Sherlock decided to start with gently sucking on his neck. It was a strain for him to recognize the meaning behind small muscle spasms, tightening of different places on the body, what the noises meant. Sherlock was an expert at noticing them, but never could interpret them.
John, however, thought Sherlock was doing brilliantly.
He sucked at John's skin until he whimpered – a rewarding sound. A sound of pleasure. How could he get him to do that again?
Sherlock's mouth traveled down to John's nipple and experimented with biting it gently. A gasp – another rewarding sound. However, he still felt as if the doctor were holding back. He wanted to steal John's self-control just as John had stolen his.
John soon found that he had every right to be nervous. Sherlock was truly incredible. He quickly identified how much pressure to apply and where to apply it to make John's mind go completely blank. When the detective finally reached John's cock, begging for attention, he spared no time discovering what would draw the most beautiful moans from John's lips.
Sherlock finally took John in his mouth, and was rewarded with hands fisting in his hair. Sherlock found all John's weakest points and utilized them to the point of agony. What Sherlock could do with his tongue...
John came sooner than he had in several years, a cry on his lips forming around Sherlock's name.
The doctor was in such a haze that he didn't realize Sherlock had climbed back up to his side until he spoke his name.
"John."
"Y... Yes?" John's erratic respiration interrupted his reply.
Sherlock lifted himself up on one elbow to lean over John and look into his eyes.
"I love you."
He kissed his doctor then, a smile on both their mouths.
They fell asleep in each others' arms.