Why didn't you tell me?
4 seconds sound clip from the Holiday Inn (1942) movie soundboard.
You can hear this line at 00:39:37 in the Blu-ray version of the movie.
Quote context
[...]
- I think you're better off doing a single. You're a born soloist, you know.
- Oh, no, no, I've got to have a partner. And when I find her...
- Yeah, I know, you'll fall in love with her. You haven't missed yet.
- Boy, you must have been high.
- Doing a complete dance routine with your new partner and you...
[...]