Why not?
4 seconds sound clip from the Blade Runner (1982) movie soundboard.
You can hear this line at 00:20:42 in the Blu-ray version of the movie.
Quote context
[...]
- Is this testing whether I'm a Replicant or a lesbian, Mr. Deckard?
- Just answer the questions, please.
- Why not?
- You're watching a stage play.
- The guests are enjoying an appetizer of raw oysters.
[...]