Quote from Joey in The One with Rachel's Inadvertent Kiss
Joey: Yeah, that's her. But you know what, it doesn't matter. I'm never going to get to meet her anyway. Monica: Why? Joey: Because it's impossible to find her apartment. She lives in, like, some kind of hot-girl parallel universe or something. Monica: What are you talking about? She obviously lives on the second floor, seventh apartment from the left. Joey: No. No, she lives on the 3rd floor, eighth apartment from the left. Monica: No. Those first two windows, that's the lobby. And you know that other window other there is the stairway. You've been counting wrong. Joey: I did not know that. Thank you, Monica. I can't believe I almost lost another girl because of counting!