Okay, so this just occurred to me: Ennis tells Cassie "I guess I wasn't much fun anyway", not knowing what else to say.
Cassie of course replies with her famous line: "Ennis, girls don't fall in love with fun!"
Where did Ennis get this line? Could he have been listening to Cyndi Lauper on the way to the diner?
Released 6 September 1983, Lauper's debut album She's so Unusual featured her first number one hit Girls Just Wanna Have Fun.
[youtube=425,350]http://www.youtube.com/watch?v=PIb6AZdTr-A&ob=av3e[/youtube]