My friend and I were discussing this fandom the other day, when I remembered this wonderful story I read but I can't remember the title, author or where I found it (sorry). I know it was a one shot, though. Basically, what I can remember of the plot is that the boys have stopped at a gas station and Sammy (I think) is in the bathroom trying to pee, but he can't and then Dean walks in, sees what's going on, takes Sam in hand and says something like, "I'll point and you shoot." So Sammy finally goes and then some guy walks in, or something. It was really wonderful and I would really appreciate any help finding it. Thanks so much! (Also- I think it was, aside from the obvious implication, only very lightly Wincest, if at all.)
ETA: Found! Thanks to
dhyi.