Watson opened his eyes, faintly surprised to hear this. They had never discussed that side of things, although he refrained from pointing out that he, in fact, was in possession of a wedding ring even if he had got into the habit of not wearing it -- why invite the argument, after all, and that marriage had indeed ended, albeit in an unfortunate way.

"No, we don't." He kissed their entwined fingers, gently. "Nor do I see how we may acquire them, but, my love..." He dropped another loving kiss to Holmes's knuckles. "We've already broken every convention of the institution. A ring is just a symbol."

After busying himself a moment longer kissing Holmes's hand, Watson added, "It's a nice thought, though."