He hadn't expected that question. He hadn't expected curiosity into his fantasies -- but then, why shouldn't he have expected it? This was Holmes; what was Holmes not curious about? Still, it was a first; no lover before Holmes had expressed any interest in Watson might have been thinking of as he pleasured himself. It wasn't done, after all, to so much as acknowledge the habit.

He could manage to play this game.

"You," Watson murmured, his embarrassment still evident. "Your hands, your mouth, your touch." He spoke slowly, picking his words with care, trying to choose the best possible ones. "You inside me."