Watson sighed, sensing the change in tone and relaxing into that newness, gladly. He wasn't thinking about it logically, not rationally, merely reacting in a deep and primal way.

Slowly, casually, he smoothed his hands over Holmes's chest, moving his fingers into familiar, long-missed curves. He knew it all so well, even now, after so many years. He was as familiar as he had ever been.

He inhaled Holmes's scent, savouring it, tasting his skin with small, hungry kisses.