Seth can sort of tell Daniel's not entirely comfortable with talking about his childhood or his parents - the distant look is a bit of a contrast to his usual bouncy self when talking about things. He can imagine moving from place to place to be a difficult way to grow up, never settling in the same place for all that long, but still... Getting to see so much of the world must've been amazing.

And then of course he gets the answer back. "Well, you already know some of that," he answers, his turn to have downcast eyes. He hadn't been consciously aware of it when he was actually in the dream, but once he woke up, he'd remembered what the supervisor had shown Daniel. And he's not sure what he wants to add to that. It's not how he'd wish for Daniel to find out about his background, which seems even more unimpressive now, even embarrassing, in contrast to Daniel's.