In season 10 episode 1 of FRIENDS, Mike's girlfriend Susie comes to meet Mike at his home, then Phoebe and Susie have the following conversation:
Susie: I mean are you guys getting back together or something?
Phoebe: All right. Susie Can I call you Susie?
Susie: My name is Precious.
Phoebe: I can't say that. Susie, I'm gonna be straight with you. Mike and I are back together.
Why does Phoebe say that she can't call her precious? Am I missing something?