Quote from Phoebe in The One with the Vows
Phoebe: You know, your friends getting married, it's gotta change things. Rachel: You really think it'll be that different? Phoebe: How can it not be? I mean, pretty soon they're gonna be having kids and then they're just going to be hanging out with other couples who have kids. And then maybe they're going to have to leave the city to be near a Volvo dealership.