Faith and its similarities to human sensibilities would be a good talk for them. They deserve to be on the same page. Lucy may even discover that his take on faith isn't so different for him as it for humans. Faith just means that he believes in humanity and most noteworthy the people he calls friends and deeply feels a connection to. He would actually thank the Winchesters for opening his eyes over the years he's known them. Well, something about the signals Cas is getting says tonight is not the right time to vanish and start cooking using the bunker kitchen to keep Lucy's eyes off the surprise. Castiel isn't the best at reading body language so he leans in, as well, and rather than find himself too off guard by the kiss she placed to his cheek, he does the next stupid thing to come to mind. "Your hair smells good," he compliments her after smelling it. "Thank you," he adds to her wiping sauce off his face.

Only she could help him find out that mint-chocolate is a better choice because she has his ear. Most people don't seem to recognize that Sam is a nag, Castiel doesn't know why. In any case, everything Lucy does for him makes him so happy. She's enlightened him to thin mints recently as well.

Clearly, he is not making himself very clear either. "Okay" makes her sound like she has doubts, and he knows switching from angel to human for a few days a month makes his emotions harder to decipher for himself. One thing that does not help is the human language being so limited. There's no word for what he wants to say in enochian either. In fact, it occurs to him angels to not have any word in relation to love and family either. He struggles, but does not hesitate to try putting something out there for her. "I- No. That's not the exact way I would put it. As they say, "I want more.""