This is my favourite headcanon and no one is going to take it away from me.
I mean on the one hand I feel bad about the privacy violation but on the other, it’s now firmly established fanon that Dean’s longing can be heard by Cas anyway and I think we have enough evidence to say Dean’s been longing 24/7 since he found out, AND he’s got to be lobbing reassuring prayers at Cas whenever he has some down time or feels stuck on the research, so at first, like, right after Cas gets possessed, Lucifer is just like “Oh this is cute, he’s worried about you”
and then three days later it’s like “does he ever STOP worrying about you?”
then “Castiel, your annoying little human pet is in the same ROOM as us why is he STILL praying?”
“Cas, this isn’t funny any more I’m going to fly over there and break up with him for you if he doesn’t stop soon”
“How can it be even worse how he knows you’re off the market and taken by me? I should have killed him when I had the chance!”
“Castiel, your boyfriend is praying to you while watching a wrestling match. Cut your losses with this dudebro. Friendly advice.”
“What if I started texting him back every time he did it? That might shut him up.”
“Cas I swear to Dad he just prayed to you while writing a shopping list. I say we let Amara eat him just for some peace and quiet up in here.”
“Castiel, you know what, I am actually starting to feel some grudging respect for what you put up with if it’s like this all the time.”
“Oh for fuck’s sake, he STILL at it, NOW, while talking to YOU – I can’t take it any more!”
“DO YOU EVEN KNOW WHAT YOU SOUND LIKE DEAN WINCHESTER?”
Omg A+ gif use. Headcanon accepted! 😅
Why do you think Luci was so grumpy and ready to fight Crowley when he showed up? He’d JUST gotten Cas to the point where he wasn’t ALSO providing a running commentary. It takes a lot of mojo to redirect the Dean Winchester Channel so it’s not reaching Cas, but it’s worth it so he doesn’t have the both of them yammering at him 24/7.
“I said yes to you so we could defeat Amara, Lucifer. If we do that, you can leave and won’t have to subject yourself to Dean’s longing anymore.”
“Maybe sitting on your ass playing Angry Birds isn’t the best use of your time, Lucifer.” “BUT IT SHUTS OUT DEAN’S NAGGING VOICE FOR JUST A FEW MINUTES.”
“I think this might be worse than being locked in the cage with Michael. At least Michael shut up once in a while.”
“It’s so distracting it’s knocking me off my game, Castiel. I came THIS CLOSE to accidentally letting CROWLEY smite me, for Dad’s sake!”
Now, while in Amara’s care and being tortured:
“Uh, Cas? Buddy? Pal? Uh…. you figured out how to make this longing thing work in reverse? Maybe use it to text GPS coordinates to your boyfriend to ask for a little bit of a rescue? Because Dad’s not answering the big red phone and those Winchesters might come in handy right about now…”