Driving down the road, Sam and Dean have a semi-gross brotherly conversation. Sam: "By 'old friend' you mean...?" What, Sam? Do you want him to say "fuck buddy"? Dean won't take Sam's gross bait, though, laconically noting just that he and this Cassie girl "went out." Sam continues to have his face in the gutter: "You mean you dated someone? For more than one night?" God, quit thinking about your brother doing chicks, man! Dean finally explains: "Dad and I were working a job in Athens, Ohio, she was finishing up college, we went out for a little while." I think that counts as pretty natural exposition there. Sam then wonders about Cassie's father's death being more than "a standard car accident. I'm not seeing how it fits with how we do. Which, by the way, how does she know what we do?" Dean doesn't respond with anything more than pursed lips, until Sam exclaims, "You told her. You told her? Our big family secret, rule number one, we do what we do and then we shut up about it." Sheesh, that rule is quite a mouthful. Can you imagine how much less compelling Fight Club would have been with that crap? "First rule about Fight Club: We do what we do and then we shut up about it. Second rule about Fight Club: We do what we do and then we shut up about it." Anyhow, it's been well remarked on in the forums that there is no big Rule Number One for the Winchester family other than a loose "keep things quiet so people don't throw us in the looney bin." So who knows why Sam's panties are in such a twist. Sam continues, "For a year and a half I lie to Jess and you go out with this chick from Ohio and tell her everything." Hee. "This chick from Ohio."