Canon Mocked Your OTP

Dean: There's Sam girls and Dean girls. And what's a slash fan?
Sam: As in... Sam slash Dean. Together.
Dean: Like... together together?
Sam: Yeah.
Dean: They do know we're brothers, right?
Sam: It doesn't seem to matter.
Dean: Ah, come on. That's... that's just sick.
(Supernatural, Episode 18, Season 4, The Monster At the End of This Book)

Yes, Wincest fans. Eat that and choke on it.