Quote from Monica in The One Where Ross Got High
Chandler: Why can't I tell them we live together? Monica: Because they don't know we're dating. Do you think we should we eat in the kitchen? Chandler: Why haven't you told them? Monica: Well, I was going to. I really was. But then somewhere, just out of nowhere, I didn't. Chandler: Why haven't you told them? Wouldn't they be happy? Monica: So, dinner in the kitchen around 4. I'll see you then.