The Doctor looked up as he noticed the coffee smell, and grinned. "Is it?" He said, genuinely surprised that it was morning. He frowned slightly at his lapse in time.
"I finally got to a point where I can pause." He scratched his head, "Most of the night? Really?" Well, he knew he never knew when to stop, and he just needed to keep himself busy. He'd been bored out of his mind with nothing to do. But, working through the night without noticing.
"Well, now you happen to mention it. I don't always." The Time Lord paused. "Notice, that is."