Because I'm a lady, that's why.
5 seconds sound clip from the The Aristocats (1970) movie soundboard.
You can hear this line at 00:09:18 in the Blu-ray version of the movie.
Quote context
[...]
- Oh... there are a million reasons why I should. All of 'em dollars. Millions.
- Because I'm a lady, that's why.
- Ha-ha. You're not a lady. You're nothin' but a sister.
- I'll show you if I'm a lady or not.
[...]