Why not?
2 seconds sound clip from the Holiday Inn (1942) movie soundboard.
You can hear this line at 00:03:43 in the Blu-ray version of the movie.
Quote context
[...]
- Listen, honey, when you're flipping those twinkle toes who's gonna be looking at my tie?
- You only have five minutes. Hurry.
- Why not?
- Simply tell him you had made a mistake. You don't wanna give up your career and live on a farm.
[...]