[It's almost helpless, how the touch draws out a shaky exhale from Keith, his eyes closing, although nothing in the reaction seems to actually be telling Shiro not to do it more. No tension or withdrawal. You witnessed how he got this scar, you were there for him at a moment where he needed to find himself so badly - it's significant and almost overwhelming now to have him make contact with the mark that still lingers. And yet he wants it.
His own hands have definitely stopped bleeding entirely now, stained though they are, stained everywhere really, but it's not a concern right now to Keith either. He keeps breathing, palms resting light on Shiro's shoulders, and that's enough to stay grounded.]