Quote from Phoebe in The One with the Joke
Phoebe: You're just not as easygoing as Rachel. She's just more flexible and mellow. That's all. Rachel: Well, people are different. Phoebe: Yeah, you know, Rachel she'll do whatever you want. You can just walk all over her. Rachel: What? Wait a minute. What, are you saying that I'm a pushover? I'm not a pushover. Phoebe: Oh, okay. You're not a pushover.