When you marry champagne, you can't trade it in for beer. You're stuck with it.
5 seconds sound clip from the The Leopard Man (1943) movie soundboard.
You can hear this line at 00:41:07.425 in the Blu-ray version of the movie.
Quote context
[...]
- We seem to be playing tag, or maybe hide-and-seek, huh?
- Is someone with you? Can I get you a drink?
- It's taken this impossible trip to show me what an old fool father has become.
- When you marry champagne, you can't trade it in for beer. You're stuck with it.
- I don't understand that fancy talk. You mean I'm a gold digger? Sure, I'm a gold digger. Why not?
- Why not, if you like it? If that's what you want.
- Who's Carlos Dom-what's-his-name?
- Nobody. Boy who works in a grocery.
- Yeah.
[...]