Even though both Dean and Sam got hurt, Cas always heals Dean first, if not only Dean. That time in the crypt when he broke through Naomi's mind control after beating Dean bloody, he healed him up using his whole palm cupping Dean's face instead of 2 fingers. But it's back to 2 fingers now recently.... Why does it feel more intimate when Cas heals Dean than when he heals someone else? lol
Don't you do things more intimately with the person you love than anyone else?
Like just getting them a beer:
Or looking after them when they're unwell:
Or seeing them for the first time after they broke your heart:
Thinking about how wonderful they are while they are being self deprecating:
Even just entering a room:
So yeah, the healing thing is a part of this:
Especially relevant with how he does it in 12x23, not at all as he usually would, even though he’s just shouted his name and ignored everyone else in the room.... WHAT IS GOING ON WITH CAS?! I mean maybe he’s just super busy with the nephilim being born upstairs and lucifer on their trail but add this to all the other weird behaviour and it all adds up to something weird going on with him in this episode.