To be asked -- and so irresistably -- to do exactly what he wished to do was more than Watson could resist. Wisdom be damned, he hesitated a moment, memorising the moment, his mouth hot against Holmes's shoulder before he did exactly as he was asked, as he had wanted, and bit down onto Holmes's skin. He sucked gently, soothing after the harshness of his teeth.

His hand over Holmes's cock moved a little faster, a little harder, a little more desperate.

"You are mine," he half-gasped, half-hissed.