[Dick fielded the question casually enough, shrugging again while going to put more books back on the shelf. It wasn't the most out of the question leap in conversation, she apparently did the whole dream sharing thing, and they were on the topic of sleeping anyways. Nightmares wasn't an out of the question topic.]

I don't know. Work related stuff, mostly, I guess, if I have them at all. [Which again, didn't generally happen if he was exhausted.] Why, what kind of nightmares do you have?

[Throwing the ball back in her court could give him an idea of why exactly she was asking.]