John pushed Sherlock's stupidly tailored shirt off his thin shoulders and leaned in to nip and lick at his nipples. He wanted to bring Sherlock to the edge. See how he reacted to being kissed, bit, sucked...

"Sherlock... don't stop. Never stop." He begged, "just love me."

He moved one hand to move along Sherlock's back towards the curve of his arse.