#dean simply worked as a good focal point through which i could make the argument

[incesthemes]

there is interesting johndean subtext and insinuations across kripke era, usually through an antagonist insinuating parent-child sexual violence in order to exert dominance over dean. this type of mockery exploits that ambiguous relationship between john and dean and reminds dean that he never had a normal relationship with his father, and that makes him gross and wrong. it doesn't actually matter in the end whether john was sexually abusive to dean. the core of their relationship was damning enough: dean was made to take the place of john's wife—to comfort john and raise sam—while simultaneously being his son. the codependent nature of their relationship implies the incest that underscores their dynamic. again, this is regardless of what literally occurred between dean and john because there is enough doubt toward the nature of their relationship that multiple antagonists can use it against them.

sonwife, brotherhusband—dean is stuck in a liminal space between family and lover and is unable to put his feet firmly on just one side and instead has to accept both together or abandon both together. he doesn't get to have a relationship with his family without it being simultaneously incestuous. he plays the role of wife to john and mother to sam as mary's replacement; he therefore becomes more than a son and transcends the boundaries of the familial into the incestuous. it's baked into the dynamic and he can't hope to escape the liminality in which he's stuck without abandoning his entire family altogether.

this ambiguous relationship is further acted out with sam, where people perceive them as lovers rather than brothers; where their mutual devotion trumps, neglects, and disallows any other close relationship outside each other; where their physical closeness is viewed through an unusually sexual lens despite no literal sex acts between them taking place on screen. once again dean is stuck in a liminal space, paralleling the ambiguous and uncertain relationship he had with john.

in the end, sex (and sexual violence) is just a symbol of this codependency and uncertainly incestuous dynamic. sex acts in kripke era end up being symbolic: misinterpretations of sam and dean's relationship; accusations of sexual violence; literal, on-screen sexual moments between the brothers and someone else. it's a literary device that highlights the incestuous themes of the show. dean hand-picks women for sam to fuck because it allows dean to be symbolically part of sam's sex life. henricksen accuses john of raping dean because it is a symbol of the unhealthy, codependent relationship dean had with his father. the samulet stays on during sex because sam is symbolically integral to dean's sexual gratification (seen too in the way both dean and cassie in 1.13 appear to kiss the amulet at least once in the dark room). sex is used to signify more than what's literally on the screen, and the connections between the literal sex acts and the blurred lines of dean's familial relationships allow for a reading of incest between both john and dean and sam and dean.

it never mattered whether johndean or samdean had a sexual relationship in the canon because that was never the point. the point is the liminality that permeates the narrative. sam, dean, and john all stand upon a threshold between acceptable and taboo. the point of it all is the doubt and anxiety, the are-they-aren't-they that is never answered. the absence of incest within the text invites the understanding that the incest was, in fact, always there.