Quote from George Sr. in the episode Carbon Dating and a Stuffed Raccoon
George: Want to hear something cool? Sheldon skipped out of that lecture with that little Paige girl, snuck into a closed exhibit. Mary: You're kidding. George: True. [LAUGHS] Even got, uh, "arrested" by the museum security cops. Mary: Why would you think that's cool? George: Sheldon got into trouble with a girl! I'm bursting with pride. Mary: [SIGHS] You know what? I don't want to talk about it. George: There, right there. That's why I love you.