Is There A Huge Difference Between "Would you〜?" And "Could you〜?"

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Jan 22nd 2012 11:42
I've ever read a book,"Men Are From Mars, Women Are From Venus." written by John Gray. The book is about how to keep a good relationship between men and women. The author suggested women to use "Would you〜?" in stead of "Could you 〜?" when you like to ask something to your boyfriend or husband because there is a huge difference between them.

At first, I didn't recognize any big difference. We learned at school that both expressions are equally polite. But he insisted in his book that if you constantly use "Would you 〜?"in your daily conversation, you might not be able to maintain a good relationship with your spouse or boyfriend.

Here is his explanation: "Could you〜?" originally comes from "Can you 〜?", which is a politer question, but it also implies whether you have an ability or not.

So, "Could you take out a garbage?" has a slight nuance that "You have an ability to take out a garbage and why you don't do that?" Thus, there's a possibility that men might take it as a criticism.

I'd like to ask male native speakers of English?
If your girl friend or wife ask you as follows, do you feel bad?

"Could you bring a beer ?"
"Could you wash the dishes?"
"Could you fix our lunch?"
"Could you drive a car?"
and on and on everyday...

Is his explanation valid?