It would be a combination of genetics and learned behavior.
DNA
Because they made us.
Biologically they have mothers and fathers. Male bats do not help raise the baby bats or pups.
Not all people hit their children.
His fathers name is jake and his mothers name is nutmeg.
his mothers name is kay and his dads name is glenn
yes they are and no they don't have different dads or mothers,
Because men don't have the organs to get pregnant or carry babies.
A Great half uncle.
Parents are older and wiser so they get to make the rules.
his mothers name is kay and his dads name is glenn
Hana Brady's mothers name was Marketa and her father was Karel
Like, yah. Isn't it so obvious?