“I have to go, Avi.” He gives me a look like he’s not really sure if he wants to, and it’s starting to rip me up a little. I just nod—it’s all I can do—as he wanders back into the bathroom, getting dressed quickly. On his way out the door, he stops to look over his shoulder. His eyes drop to the cat, and he says, “Bye, Robin.” Then he aims those pretty orbs of awed hazel at me and whispers, “Bye, Batman.”