One of the dearest headcanons to me involves 9-year-old Dick getting appendicitis and needing to get his appendix removed urgently, Bruce rushes him to the hospital and is worried sick as they wheel his boy into surgery. Dickie wakes up after surgery loopy and drugged out of his mind, takes one look at Bruce and starts to giggle. Then he points at Bruce's face and begins to (very adorably) say stuff like you're bruceman! and broosh and brucester and Bruce has to try so hard not to smile back because he doesn't want Dick to start laughing hysterically and pop his stitches. So he just places a hand over Dick's and hums placatingly. He may not be smiling but his heart has just grown three sizes.