The common sense is always there in the working society.
According to this, people from different companies are able to do any business transactions.
Once we get in the society, we have to learn it and build a set of knowledge of it until we retire.

There is no such thing as "the common sense" in raising an infant.
It just doesn't exist.
An infant's will is always exclusive and his or her actions are mainly involuntary, so we, parents, are always passive.
Generosity, patience and a certainty that this infant is ours can only let us carry on.

Actually, there's one thing in common.
The more prepared we are, the higher our chances of success both in work and raising an infant.
Don't you think so?