Castiel could learn a thing or two from her. In many ways, he already has, as well. Her question turns his on the spaghetti. "Yes. That sounds correct." Of course Cas feels like there's something they're missing, a step which he can't not place. For instance, the sauce should go on top of the spaghetti beforehand.

It goes without saying that Cas could benefit from an explanation rather than none at all. Even so, the language between them is less and less a barrier each day. It does not go unnoticed that Lucy served him an ungodly amount of pasta, just like his body requires. Yes, ungodly in that God (Chuck) has a small appetite befitting his size. "I see. So, some things constitute as cheating." He nods, beginning to understand.

There could be stranger things about his word choice and the connection she draws from it. As for the shift in conversation, it seems no stranger than the ones he's had with the Winchesters. But no, he does not need to think about it to answer her. "As in right at this period of time. No. No one has expressed any interest to." In translation, neither has he.