“Have I told you my favorite joke yet?” Cap asks. I shake my head and grab another tissue from the box in his hands, relieved at the change in subject. “Knock, knock,” he says. I didn’t expect his favorite joke to be a knock-knock joke, but I play along. “Who’s there?” “Interrupting cow,” he says. “Interrupt—” “MOO!” he yells loudly, cutting me off. I stare at him. Then I laugh. I laugh harder than I’ve laughed in a long damn time.