We know that in God’s creation, appearances are not our sole guide. Science alone would claim that the Eucharist is only bread and wine and yet we Catholics know otherwise. Maybe this relates to how we are to understand the scientific evidence of human origins. Maybe when we think of Adam and Eve we need to think more spiritually.
Is it possible within Church teaching that when God formed Adam he formed one spiritual man in many of the adult males of the Homo Sapiens species? These males would think and act as one spiritual being each loving their neighbor as themsleves such that the actual physical individuality between them was of no consequence. The same would be true for the women at the time. In this way, Adam truly would be one man, just as Jesus in the Eucharist is truly one even though there are many hosts.
Then when Satan tempted Adam the entire spiritual being would be affected and sinned as one being. This would be the entrance of division into man. Then man knew he was naked. He became aware of his body and for the first time thought of himself as a separate being in his body.
End Hypothetical Possibility
It is a thought, I don’t claim to know the answer. It is similar to my earlier post about the fact that man was made in the image of God. I seek more knowledge and understanding. I do have faith that there is no discrepancy between Revelation and science. One might be tempted to think there is but I have faith that there is not because I have faith in Jesus and in His Holy Catholic Church. I think it is mainly a matter of a need for deeper (or perhaps fuller) understanding.