He can't recall a time that anyone's ever sang for him quite like this before; there are others around them, yes, but it's really just for him, for the pair of them, and it's beautiful. A moment that's somehow so private and intimate, yet laced with the playful ease he feels like they've always had with one another. He can be silly and serious, of course, despite his default towards whimsy. And she's not the first person he's ever been able to connect with so deeply, but Julia is noteworthy for being the first in a very, very long time who's made him feel less afraid to explore the depths of his hearts with, to be his whole self with. Loving others comes easy to him, but letting himself genuinely fall in love is...that thing he always runs away from. Because he must.

But they're dancing and she's singing to him about love, and he's quite sure he hasn't known this particular manifestation of joy in so long. He might even blush a little and duck his head and smile when he presses a kiss to her forehead. As her singing fades and their steps naturally slow, the Doctor's too restless to lead her to one of the cabins — there's still too much to do and see, after all! It's only when the night naturally begins to wane a bit that he offers to lead her to the cabin if she's ready to settle in for the night.

"Not that we have to sleep right away, of course," he smirks a little, teasing, perhaps trying to set himself at ease. "I brought a deck of cards if you're itching to play Go Fish or Gin Rummy!"