He doesn't know what's happening, he's never felt like this before, but he just knows he wants this feeling to last as long as possible. Maybe she'll figure out, eventually, that he's not worth it, but he feels so incredible with her, and he wants her to feel that way with him, too.

When they get to the water, he smiles over at her.

"Ah, now, come on, sweetheart, ain't I earned it to watch you first?"