Castle: High School friend, huh? I bet she knows where all your bodies are buried.
Beckett: You can dig all you want, Castle. My secrets are safe with her.
Castle: How can you be sure?
Beckett: Because whatever she knows about me, I know worse about her. We used to hang out, big group of us, had a good time.
Castle: And... What's a good time?
Beckett: Well, if you don't know by now, I'm sure it's too late to show you one.