it’s canon that sam knocks and then enters before dean’s even responded, so, you know…keep that in mind for future fanfic purposes and stuff if u know what i mean
he knew Cas wasn’t there so why bother waiting for an “All clear”
*Casually points out that the bisexual plaid shirt is on the chair next to the door*
I mean
I knock if someone’s door is closedit’s polite
Sam is polite
of course he’s not just gonna barge in on Dean when the door is shutmost people knock before entering like ?
no, friend. the point is that sam knocked and then /immediately/ entered before dean said “yeah” or “come in” or any verbal cue to let sam know it’s ok to come in. do u see what i am saying.

