I think some of Yvonne DeCarlo's best moments on the show is when her character Lily would make the most absurd statements, but DeCarlo would deliver the line in such a matter of fact way and with a straightforward manner, that it made it very funny.

I think the funniest episode for me was # 53 Herman's Peace Offensive. Where Lily hit Herman and knocked him over the couch and told him she wouldn't tolerate violence. I laugh at that evertime I see it like it was the first time I had ever seen it.

I'd put a screenshot of that scene in here for everybody, but I'm at work, I'll put one in later.