Hell's Half Acre

Ooook...but that only makes sense if Dean hadn't made a deal. Sam wasn't about to go back to school with Dean's head in a noose, so it was essentially a non-issue. They weren't even out of the graveyard where Dean ganked YED before Sam knew about the deal. He stayed to save Dean, not necessarily because of the demons...I mean, yeah, it was part of it, but in my mind it was the smaller part. If they had brought up the topic, it would have made Sam look like an absolute douche if he justified it by saying they had to clean up the demons. He essentially already justified it with his whole speech about how if looking after Sam was Dean's job, then looking after Dean was Sam's job.