Why do kids hide when they are doing something wrong?
Let me give you an example. My son Luke is a year old and one day when my wife and I were in the living room, Luke found himself into the kitchen trash. He quietly exited the kitchen and came into the living room, behind a couch where he could not be seen, to cosume his found treasure of moldy bread. Why did he hide? Because he knew what he did was wrong, no one had to remind him of that.
Lets go back to Genesis for a moment. When Adam and Eve ate of the fruit and sinned what was there first response? They recognized that they were naked and they sewed fig leaves together and made coverings for themselves. Why? Because they knew they were wrong. Who told them that they were naked? No one but themselves.