[Sokka didn't think that this guy was stupid before, but he kind of does now. At least, he has to resist the desire to slap his forehead out of frustration upon hearing that reply. He used to think it was difficult reminding a group of children to keep their voices down while they were traveling in enemy territory, but his sister and their friends have nothing on some of the adults of this place. It seems entirely logical to him that it's not safe to have open conversations about anything where the enemy (aka anyone who isn't a new arrival, and maybe even some new arrivals, too) can possibly hear, but judging by this guy and the other people stirring into conversation around them, he's an odd one out.

Sokka tends to run paranoid and skeptical, so under normal circumstances, might consider that this guy is being intentionally obtuse to get information out of him, but he doesn't sound like a local, and his reaction to his "nap" seems pretty genuine. That distrustful look is also kind of what Sokka is going for here, though he thinks it should be leveled at this place at large, rather than himself.

He gives the guy an incredulous look, though the effect is probably lessened by the fact that his cheeks are still dampened with drying tears.]

You mean dreams? I dream all the time! [He says this slowly, enunciating each word with emphasis, trying to encourage the guy to run with what he's saying.

At least he's getting information out of this; namely, further confirmation of the vision/hallucination/memory mix that still has Sokka's chest feeling a little heavy. He does want to know what the guy saw, so he tries:]

Last night I had a dream that a talking — [he almost says koala sheep, but he has recently learned that animals are different here, and so he amends it to simply:] sheep led me far away from here, to a room where we were all alone.

[He raises his eyebrows and leans in a little, expression intense. Get it?]