#1. During their first time, Sam tops, and afterwards apparently confuses top/bottom with dom/sub. So he keeps trying to tell Dean to do things like strip, or get down on his knees, and Dean just laughs at him and tells him that's not the kind of relationship they have. I don't remember anything more specific than that, but the the tone was basically light.

#2. This one I remember was a prequel/teaser for a longer AU work that hadn't been written yet. In it, Bobby finds a guy who keeps skinwalkers as pets and kills him and them, all except for the youngest, who is 7-8-9? (something like that) and Bobby can't bring himself to do it. So he takes the kid back to his place, cleans him up, tries to figure out who he is and where he came from. Turns out, It's Dean, and he was kidnapped and changed deliberately by these guys who sold him and the others they made for money. I thought It was one of tigriswolf's fics, but I looked and didn't see it.

ETA: #2 Found http://hoodie-time.livejournal.com/319974.html#cutid1 See Spot Run by Liliaeth 

No wonder I couldn't find it.