[Stiles doesn't squirm under the scrutiny, because he is being honest. He only squirms when he's lying badly. It's why his dad never believes half the crazy stories he comes up with when he's trying to cover up the actual crazy things that he's gotten himself into. He takes a moment, though, when Dean asks him questions. He looks down at his glass.]

Because you don't want to be here in the first place? Because I know things that you probably don't really want me to know?

[He looks back up at him, sits back in his seat.]

As for why I'm not asking for someone else? [He looks at Dean intently.] I don't believe you're some kind of lost cause.