He listens to what must be the equivalent to gushing for Damian. It doesn't take a detective to realize that Damian is 1) very close to the Dick in his world and 2) has borderline hero worship for him. For Damian, it must be almost the same as it was for Dick when he met the Bruce here. Almost but not quite. So many similarities but the differences were glaring and just ended up making you feel uncomfortably homesick.

"You're right: my jokes are actually funny."

But he stops teasing and looks more understanding.

"Meeting me must be like me meeting B. Meeting someone you're close to who's almost but not quite. Makes you a little homesick, doesn't it?"