Castiel had realized he rather liked the water, the fall of the waves and the peaceful still that would come over it on occasion. He'd noticed that when he stayed with Meg, with her so close to the ocean and while he'd had... unpleasant experiences with the water, the memory of walking into that lake to try and hold off the Leviathan threat, even get rid of them if he could, being the most recent memory he had. So, being here with Meg, getting to enjoy just the simplest of human moments, it was something. It made him feel some hope that he'd be able to make it as a human, if not because he had to, but because he wanted to. He wasn't filled with as much despair as he'd been before, although he still missed the feeling of his grace and knowing he was connected to his brothers and sisters.
"I'm certain there are bags of some kind, if it does indeed make you feel sick at some point." He took that nauseating comment literally, although he was aware of her sarcasm and how it worked. The smile was comforting, to know that she wanted to spend this time with him. It made him feel less out of sorts in his lack of knowledge of how a date really worked and what was expected of him on one.
To slow her pace more, Castiel moved closer to her, his hand at first lightly brushing against hers, before the contact made him realize he wanted to touch her. Contact was key, that was something he remembered from his varied observations of humans on dates. That brief contact turned to his hand tentatively reaching for hers, something that he hoped would be met with a positive response, rather than a negative.