You can't say anything nice without spoiling it.
2 seconds sound clip from the The Big Combo (1955) movie soundboard.
You can hear this line at 00:26:11.855 in the Blu-ray version of the movie.
Quote context
[...]
- Lieutenant... either book me or let go of my arm!
- You're a beautiful girl, Rita. But you're stupid.
- You can't say anything nice without spoiling it.
- Why do you waste your time with a cop?
- You could get me a nice, rich hoodlum. You should be able to recommend one with your connections.
- What is there about a hoodlum that appeals to certain women?
- A woman doesn't care how a man makes his living... only how he makes love.
[...]