Sparda often reassured you not to work your mind trying to understand the more complex workings of his demon biology, and he meant each word. Still, he was slightly worried about how you’d take it when this side of him that he thought he wouldn't have to bother with anymore, came knocking at his door again. 

He didn't want you to view him as overbearing or controlling; even less did he want to risk you misunderstanding his sudden need to dote on you as him thinking of you as weak or incapable. He explained it to the best of his capabilities, often pausing to find the right words. In the end, he explained it by comparing it to nesting rituals of some birds. He added that in his case, it manifested in him fluffing up and adding a few more pillows to your bed, replacing the normal blankets with something heavier to keep you extra warm, and, of course, a desire to keep you close. 

He arranged the bed for you and then stepped aside, holding his hand out to gesture to it. “Does it have your approval?” His tone holds a slightly humorous note, as if he can't take himself fully seriously, but it also holds something genuine. The old demon wants to know if his lover, his most cherished bond on this planet, approves of his work. The pillowcases were silk, and the duvet was in a dark red velvet cover that fit the rest of the bedroom aesthetic beautifully and made the bed appear even warmer and cozier.