The moment they bit into the forbidden fruit, something happened--their eyes were opened! Now, isn't that nice, getting your eyes opened? Remember what the blind man said when Jesus healed him? I was blind but now I see! His eyes was opened.
When the eyes of Adam and Eve were opened, what they saw first was their nakedness [Genesis 3.7]. They felt shame and covered themselves. Wasn't that just the right thing to do? You're naked, so you cover yourself.
But felt shame about what? Who was going to see their nakedness? God? The animals? Each other? There was no reason to feel shame. But they felt it was wrong. That was the effect of the fruit of the knowledge of good and evil--feeling ashamed over nothing. Worse, feeling ashamed about what God found to be "good."
"Then God saw everything that He had made, and indeed it was very good," [Genesis 1.31]. When God said this, he had already made Adam then, and Adam was already naked.
Search on and you'd get more mined power.