[flashback:]
Young Monk: You always turn your lock back to zero. I noticed that. I do that too. So later it's easier to open.
Young Sherry: Uh-huh.
Young Monk: Actually, there are a lot of things we have in common. [grabs card] "Things Adrian Monk and Sherry Judd have in common."
Young Sherry: You made a list?
Young Monk: One, our lockers are right next to each other. Two, we both like The Patty Duke Show. Even though she has to be lying because they're supposed to be identical cousins, which is biologically impossible. Three, perfect attendance records. And, uh, four... Neither of us has a date to the spring fling.
Young Sherry: How do you know that?
Young Monk: I happened to catch a glimpse of your weekly planner. And I noticed that you have a babysitting job lined up for that evening. Unless I'm wrong, which, you know, I'm not.