who's more dominant? (слэш)

Dean and Sam discover the huge amount of fanfiction people have written about them. Eventually though, they each become fixed on one point of contention in the fandom: "If Sam and Dean had sex, who would top?" They discuss it jokingly, but it soon becomes a real argument when they both stubbornly insist that they would be the one doing the fucking. They're both infuriated that their brother thinks they'd be the bottom, lying back and taking it like some submissive girl. Fuming at each other, they each do as much research as they can to try and prove their case, pouring over message boards, reading articles, even tallying the number of fics tagged with "Top!Dean" and "Top!Sam". Eventually they realise that there's plenty of evidence for both sides, but that makes them even more pissed. They decide to settle this - for real. They're going to come at each other with all they've got, toppiness turned to full blast, and see who wins. See who ends up impaling the other on their mighty meat shaft. See who dominates. Later, when one of them is pounding the other into the mattress with all they've got, they - and the fandom - will finally know who tops.