That's... part of it. The other part has more to do with not being able to hold off any longer. His motions are long, slow, sensual. A small, quiet, and definitely pleased shudder escapes him, closely followed by a few moans of his own. He savours every part of this experience, savours being this close to her, being united with the woman he loves. And that last thing... makes everything that much more intense for him. He had no real emotional connection to most of the women he'd been with before, only mutual desire. And it's different, very different, when that emotional connection is there. To him... it makes the whole thing that much better.