"Good." Sherlock purred into his ear. "Because I'm not sure that I can resist you for too much longer."

The soft kisses turned into bites, always below the collar of his shirts, Sherlock knew EXACTLY how far he could go that no one would see the brands that he left on John.

"Mine." he growled, rolling John onto his back and leaning over him. Now he could get to a lot more of John, including his nipples. He took the nearer one into his mouth and sucked and bit it, just on this side of painful.