Of course, I'm just being polite.
2 seconds sound clip from the Is This Goodbye, Charlie Brown? (1983) movie soundboard.
You can hear this line at 00:17:46.180 in the DVD version of the movie.
Quote context
[...]
- Good morning, sir. You're up early.
- You'll never guess with whom I had a heart-to-heart talk.
- You didn't call and bother Charles, did you, sir?
- What do you mean, Marcie, bother Chuck?
- Last night, Chuck offered to take me to a movie or something. And I'm waiting for him.
- Of course, I'm just being polite.
- No mushy stuff for me, Marcie.
- If Chuck gets too fresh, I'll deck him.
- I'm sure Charles would never do that, sir.
- Well, Marcie, I don't wanna be rude, but two's company and three's a crowd. Get what I mean?
- I hope you don't have to wait too long. So long, sir.
[...]