Looking For A Certain Fic

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 [livejournal.com profile] dhyi.

[identity profile] dhyi.livejournal.com 2007-01-12 02:26 pm (UTC)(link)
Helping Hands by [livejournal.com profile] poisontaster ?
http://poisontaster.livejournal.com/113748.html (http://poisontaster.livejournal.com/113748.html)

[identity profile] fourfreedoms.livejournal.com 2007-01-12 10:19 pm (UTC)(link)
Dude, can I just say that I love your four brothers icons. They're awesome. More people need to go out and see that movie, write fanfiction, and stay away from the mother fucking mary-sueage!