Finally, An Explanation
A late afternoon nap somehow stretched into early evening. The chosen couch was next to an unshaded window. Awakening, the full moon shone through the glass, onto the drowsy professor. "I've become a lunatic" exclaimed the stricken man to his significant other, who just shrugged as if to say, "Tell me something I don't know already."
At least there is a reason for it now.