Harry: Of course she wants to stay. Wouldn't you rather
be with Humphrey Bogart than the other guy?
Sally: I don't want to spend the rest of my life in Casablanca
married to a man who runs a bar. I probably sound very snobbish to you
but I don't.
Harry: You'd rather be in a passionless marriage.
Sally: And be the first lady of Czechoslovakia.
Harry: Than live with the man you've had the greatest sex
of you life with, and just because he owns a bar and that is all he does.
Sally: Yes. And so had any woman in her right
mind, woman are very practical, even Ingrid Bergman which is why
she gets on the plane at the end of the movie.