Bruce makes a noise that passes for 'Sure', and sort out what each of them will need. He know Clark could get all of it done in the blink of an eye, but Bruce wants to actually do this, experience t, fill a few hours and let his brain relax under the orderly lines.

He's quiet while they work; if Clark wants to chat he won't object, but won't add much beyond noises of assent or disagreement every so often. Ace wanders upstairs and lays across the bathroom doorway in a furry heap.

Eventually,

"Did you know people write fanfiction about Batman and Green Lantern?"