Well there is the case of ducklings, who think the first thing they see after leaving the egg shell is their mother. So if you are there instead of their real m

Well there is the case of ducklings, who think the first thing they see after leaving the egg shell is their mother. So if you are there instead of their real mother, they'll follow you around until they become independent. Just to show an example where some preference is not genetic, but there is a mechanism to pretty much hardwire it shortly after birth.