casablanca's airport scene

I love this film, but it contains one of most sexist lines in all of moviedom. Rick tells Ilsa she won't be able to understand what he's saying , but after thinking of it for a while she probably will. Not a today kind of line, but stangely it was in those times. But as I've read about the movie, it was rewritten almost daily, so maybe not a lot of thought about Ilsa's lack of intelligence was considered. Anyway I loved the film and smile everytime I see this part of it.