[Dave sags a little, needing that support more than he thought. Not that he's going to put his full weight on Dirk, but he needs the breathing room, at least for a short while.]

Thanks, man.

[When it seems like the moment is starting to stretch into awkward, he straightens up.]

So, think you can school me on astronomy? I've kinda been skipping the class and learning on my own, but I might've missed some shit that was supposed to have been covered.