How Destiel becomes canon
Cas: Dean, we need to talk.
Dean: Uh, sure, Cas. What’s up?
Cas: I’ve done some research online and I also asked Sam for some advice, but I’m still a bit unsure on how to do this. I was wondering, if possibly, you would like to attend a romantic dinner with me?
Dean: Do you mean a date?
Cas: Yes. A “date.”
Dean: You know we’ve been going out for years, right? You don’t have to ask anymore.
Cas: Um…no we haven’t.
Dean: Yes, we have.
Cas: I’m pretty sure I would have remembered if we were a couple, Dean.
Dean: No, man, we’re definitely together.
Cas: No, we’re not.
Dean: So I haven’t brought anyone home since 2012 for nothing?
Cas: We haven’t even had any intimate contact.
Dean: I thought you just weren’t into that! Besides, doesn’t that eye thing count?
Cas: What eye thing?
Dean: That eye thing!