What does it really mean that Adam and Eve felt no shame before the fall?

After God cleansed me, I had no shame either.

I told a guy if somebody published my diary to all of U of T, so the whole world knew my secrets, I would feel no embarrassment whatsoever.

If robbers stole my clothes while I was walking down the street and a bunch of people saw me before I could change, I would feel no embarrassment at all.

If I suddenly gained 600 pounds and was now the ugliest person in Toronto, I would feel no embarrassment whatsoever.

What does it really mean that Adam and Eve felt no shame before the fall?
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