Why is it wrong to expect a traditional marriage after traditional dating?

So, I got in to an argument with a couple female friends on facebook about dating. They all said tradition dating is the only way and a man should pay for everything on every date. I said I would agree, if the marriage was traditional too and the wife was stay at home. Some how, this is considered sexist and was told it’s just me wanting a slave. Is this a feminist thing? Do feminists really think like this?

Why is it wrong to expect a traditional marriage after traditional dating?
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