dartuser is correct on this one.
The man genetically passes on sin.
This also explains the Virgin Birth. Why Christ Jesus not only was both God and man, but the only human since Adam who was eligible to become the Perfect Sacrifice.
The first sin was attributed to Adam because he knew he was acting wrong and acted on volition to disobey God by acting independently of Him.
“The man genetically passes on sin.”
I still have to respectively disagree. If Christ did not have a sinful nature He would not have been fully man in the sense that he would not have been able to “bear the sins” of us all. He resisted sin yes, but was “fully man”. When he said “he who is without sin cast the first stone” he wasn’t saying that there was another without a sinful nature, he meant anyone who, like him, had resisted all sin.