How about:
Naturally born outgoing?
Naturally born shy?
Naturally born mathematically inclined?
Naturally born lefties?
Naturally born smart?
Naturally born dumb?
Naturally born athletic?
Naturally born musically gifted?
homeschoolers obviously have had success making the mathematically inclined.
Lets us not forget the Psychologist who said "give me any 12 children and I will raise them to be whatever you want." He was talking about Drs, scientists, mathematicians, musicians.
Of course the DUmies have developed their own training center.