Disclaimer: Don't own, really wish I did!
"Is that experiment really important?"
Sherlock sat up, turning his head and looking at John as if he'd grown two heads.
"Every experiment I do, John, is important."
"Oh, okay." With a sigh, John turned and walked away.
Following him with his eyes, Sherlock wondered if there might be a problem, but seeing nothing obvious he shrugged and turned back to his skin cell samples.
A while later, as he was reaching out for his tweezers, Sherlock felt John's hands grasp his hips, holding him steady as he gently rocked against him, placing little nipping kisses at the nape of his neck.
"John?"
"Are you sure it's important, Sherlock?"
"What?" He tried to sound angry, but his voice came out more like a breathy moan as John ran his tongue around the edge of his ear, breathing heavily into it.
Before he knew what had happened, John had him bent over the kitchen table, with his trousers around his ankles, and was gently thrusting into him. All thoughts of the experiment vanished in a haze of orgasm and endorphins, and as he slowly regained control of his neuro functionality, he noticed the grin on John's face and frowned.
"You've saved my sanity." John said dropping a kiss on his lips. "The only thing on telly was a crap programme about bubbles!"