Me: Don't say that unless you mean it.
Chas: I mean it.
Me: No, really. You don't just throw that out there carelessly.
Chas: I didn't throw it out there. I really mean it.
Me: Because if you say that to me, and I start to believe it, and then it turns out that you didn't really mean it--Well, that would be bad.
Chas: I really mean it.
Me: Say it again.
Chas: I'll help you refinish your floors.