Castiel didn't shy away from figuring out humanity and how that felt, although he still felt that detachment from his grace, that longing deep inside that reminded him that something that had been a part of him for thousands of years, was suddenly missing. But, he knew that Meg was not human. She was not a human and didn't process emotions the same way. Most demons had a way of shying away from those things, because they were seen as weaknesses. They were like angels in that regard and he understood that. But that was not to say that he wished Meg would open herself to him. Trust him. Like he trusted her. It went against everything that he should have stood for, but he did it all the same. Because he didn't have reason not to trust her. That was the beauty of it, really. Two beings who shouldn't have experienced what they were currently, defying all of that.
Her hand, it was warm and soft against his own, but it was something he got used to. The feel of her fingers intertwined in his own, the weight of her hand against his. It was something that made the corners of his mouth twitch upward, as he looked at her with a genuine smile. This was what holding hands was like. It was new for him, interesting, but he liked it. An experimental squeeze of her hand in return led him to further believe that he liked this experience. He felt that warmth in his chest, the warmth that reminded him of the things he felt for Meg but couldn't quite explain.
"Warm. Comforting, almost. I like it. It's... nice." He said after a moment. He wanted to bring their linked hands up to look at them, but he didn't. Instead, he settled for reveling in her hand in his and deciding that was high up on the things he liked about this human life and learning about human things with Meg.