"Incest is a strangely fashionable subject," Rosemary Dinnage once claimed, and that she made the claim in 1986 only underscores the point that it is not, perhaps, so much a fashionable topic as one of perpetual interest, although its continued fascination rather compromises her quaint image of a jaded press and a shocked public. The use of incest as a metaphor for intimacy is a familiar one to readers of Supernatural fanfiction, and so obvious it almost passes unnoticed, and unremarked upon except by fans from outside the constructed community of that fandom's sibcest readership. Such outsiders do come close to achieving the shocked fascination Dinnage evokes, but insiders familiar with the trope take the distinction between fictional Wincest and real-world issues as a given, too self evident to be worthy of comment. This raises the possibility, though, that sibcest's value as a shorthand for exceptional intimacy is undercut by its very familiarity. In a fandom in which Wincest is a norm, how can an author convey the strength of the bond between Sam and Dean, and make intelligible to the reader the very non-normalcy, not of the practice, but of the degree of intimacy it encompasses?
One answer lies in underlining that the relationship between Sam and Dean has existed since they were both children, and thus that it predates not only their first time together but nearly any other expression of their sexuality as well. Their shared childhood means that Sam and Dean have been aware of each other since long before either achieved mature sexual self-awareness. Roguebitch's We Are Plural, We Are Single, a "first-time" Wincest fanfic, makes brilliant use of the brother's shared pre-sexual intimacy to underscore the profound nature of the further intimacy that she depicts. As the story opens, Dean's active sexuality is contrasted with Sam's disinterest in casual hook-ups, paralleling what must also have occurred when Dean reached puberty before Sam--paralleling, too, further developments within the story, as Dean is shown to have been aware of the undercurrents of their relationship while Sam remained innocent of any such tensions. Significantly, it is only following Sam's regression to infantile dependency (as a result of a zombie attack) that he begins to acknowledge the depth of his feelings for Dean, and the sexual component of those feelings. That his helpless state reminds them both of their shared childhood is made explicit, but the thematic note, once sounded, is left to fade into the background as the present-day relationship takes precedence.
An even more interesting example is Wasted on the Young, a Jared/Jensen real person fic by Katjad and Memphis86. Here the intimacy under scrutiny is that shared by co-actors and friends, not siblings, and the motif of regression recreates a dynamic between Jared and Jensen which is the reverse of that shared by the fictional brothers they play. Jensen's regression to an infantile, helpless state leaves Jared in the position of having to assume responsibility for him, and care for him, with all the intimate yet non-sexual contact involved in tending to the physical needs of a younger brother. Again, it is only after such a period of re-established pre-sexual intimacy that the "real," sexual nature of their relationship is allowed expression. What is created is another successful vision of a bond that is, paradoxically, even more intimate than incest--because the intimacy which preceeds and takes primacy over the sexual contact.