before u say anythign rude or offensive just think to urself: would steve rogers say that? if the answer is no, don’t say it
"keep an eye on him. keep two eyes on him. send me photos with your camera phone. i know how those work now. i will expect hourly updates sam make sure he eats enough vegetables you know how he is. make sure he has enough blankets."
Oh my God, but wait….
This means Cas now understands every reference Dean has ever made….
The subtext has been recognized and understood. There is no way they can get around saying it’s not there, because even he sees it now.