[Dean's not sure how this happened. Curiosity, maybe, or too much pent up sexual tension (because whether he admitted it or not, it was always there; a spark between them, volatile and unpredictable). He's not sure he cares about the hows or whys just then, though, not with the way Castiel is practically devouring his mouth. Who knew the angel could kiss? They're both shirtless, overcoats, jackets and shirts tossed somewhere into the back of the Impala, and Dean can't help but paw at Cas' bare stomach and chest, mapping out the slim contours of his torso as he tastes him. They're supposed to be doing reconnaissance but that seems to have been pushed to the wayside in favor of exploring each other.]
starting with 2, might incorporate others later.