Damn it, robo!Sam makes me see wincest potential *facepalm*. Because they could be on a case, and Sam could want to relieve tension, and do it quickly and efficiently, and he'd ask Dean if he'd trade handjobs with him, and when Dean freaks out Sam just shrugs and says "whatever, forget I mentioned it", but then Dean is constantly on edge and he can't really talk about it with anyone, because no way is he mentioning this to Bobby, and he could try Cas but Cas wouldn't understand, and that pretty much leaves him with Samuel.