I've heard it explained several ways, including the "innocence" take:
That before eating of the Fruit, Adam and Eve were clothed in God's glory. After partaking of the Fruit, this glory was removed.
That Adam and Eve were purely spiritual beings beforehand and afterwards God made them "clothes" of physical flesh.
That before eating of the Fruit, Adam and Eve were clothed in God's glory. After partaking of the Fruit, this glory was removed.
That Adam and Eve were purely spiritual beings beforehand and afterwards God made them "clothes" of physical flesh.