His self-worth is hurt more than his hand, which will do alright in a few weeks if he keeps an eye on it; Bruce allows Clark to take it, careful, as if he might somehow do further damage on his own, despite the fact that the other man is literally invulnerable.

"I shouldn't even have the instinct." Quiet, but final. He understands Clark won't want to hear an apology - Bruce wouldn't either, maybe, if they were reversed - but it doesn't matter that he didn't actually hurt Clark. He shares nights with Lois sometimes, for fuck's sake. What does this look like, in bed with somebody else? He feels sick over it. Getting too comfortable with all of this, forgetting who and what he is. Idiot.

Trying to shake it off, but there's some deep icy chain connecting him to that unconscious feeling of horror.

"One hasn't gotten me like that in a long time."

Bruce thought they would get better, once he brought them together. But they've only grown worse.