I was reading this fic a long time ago and didn't get to finish it. It goes something like: Sam and Dean give eachother blowjobs and handjobs regularly (just to take the edge off you know?) but Sam wants something more and he starts by making dean give his a 40 minute bj. After that Dean goes in denial a bit while they still go hunting (I think there's a chupacabra somewhere in the fic). After Dean finaly accepts their relationship and they start having full blown sex and then sam tries to convince dean to bottom by filming them and showing Dean the video. He succeeds. And then stuff happens but i dont remember and i stopped reading when dean tries to convince a waitress that he and sam are together after flirting with her.