When Cas didn't move, Dean gave his shoulder a brief, but what he hoped was reassuring squeeze. Dean didn't feel all that stable, but at least he wasn't listening to the I Love Lucy show 24/7, and he hadn't had his Grace amputated. So he'd have to do.
And if all it took to help Cas feel better was to put an arm around his shoulder...well, Dean's manly image could take one for the team.
"Sure," he said, "It's the big one that says Chief of Staff. Right?"