Quote from Chandler in The One Where Chandler Takes a Bath
Chandler: What exactly did he say to you? Monica: Okay. He was talking about rules- Chandler: Uh-huh. Monica: And looking at people differently. Chandler: He didn't say anything about that to me. Monica: What did he tell you? Chandler: He was asking all these questions about you, me and London. And of course the glue that holds this all together, the rules. Monica: Okay. So you, me and London. Looking at people differently. Maybe he wants to do what you and I did in London with someone. Chandler: But what did he mean by "rules"? Monica: Wait a minute. He stopped talking the minute Phoebe came in. Chandler: Because he was looking at her differently. Monica: And Phoebe is his friend. So he thinks that would be breaking the rules. Chandler: My God, he wants to do it with Phoebe in London!