This just in: Dean has frequent and sometimes extremely long phone conversations with Sam (17 minutes, really?) even though they live in the same bunker.
Mary does not know how to filter spam, but subscribes to Biggerson’s newsletter. Dean keeps her updated on the goings-on of their lives and also I wonder if Mary told Sam the name of that guy/?
Also, four out of the six conversations in Dean’s recent call log are with Sam, even though they’re rarely apart or for long.
67% of Dean’s most recent phone convos were with Sam