i can't seem to find this one fic...
edit: found! it's
A Room of One's Own by Northern Sparrow.
here's what i remember about it:
- cas keeps on walking in (teleporting in?) on dean jerking off
- dean's still sort of questioning and he watches porn and is surprised / in denial about being turned on by watching a guy?
- you know the drill; cas eventually helps him out, etc
- cas keeps saying things in awkward ways like "i heard this particular stimulus can be pleasurable" and stuff like that and dean eventually just goes with it
- at one point sam sets up this whole thing in dean's room with a bunch of traditionally romantic and cheesy stuff including (i think) a cutout of john travolta
- i think in the beginning there was an explanation of how sam and dean sort of have a silent agreement that they'll say something like "im going to bed early" so they can go upstairs and jerk off
- throughout the story sam sort of suspects but doesn't seem to say anything, and dean's room is supposed to be soundproof but something happens to make it not soundproof so at the end sam's like "oh yeah i sort of knew because i heard you guys"
thanks in advance!