Cristina: Don't mention Shepherd. Or Montgomery-Shepherd.
Cristina: Or the fact that Shepherd is with Montgomery-Shepherd.
Crisitna: Or anything ever to do with syphilis.
Burke (laughs and rings the doorbell): I've been in social situations before.
Cristina: Yeah, well, not with me.
Burke: Well, why are we here?
Cristina: Just be nice or something.