[...she's just going to give him a critical look because that expression on his face shouldn't be there. But she's just assuming it's that Sokka's a weird boy. It's okay, they can still be friends.]

Oh yeah, that's a lot more common. Still really annoying though, so I'll give you that. You're lucky. Swapping's creepy, especially when you talk to the other person in your body and you're just staring at yourself and you realize wow, you look kind of weird.