Parents should not favor certain children over the others.
Gary who has two sons, is making out his will and last testament and is writing up the inheritance portion.
Gary wants to decide who to leave his assets to.
Gary decides to split the inheritance and give his sons an equal share to each of the two sons.
Gary decides to give all the money to one son as he believes the other son is going to waste it eventualy.
Gary's sons both are delighted that their father has left them with assets and that they have no reason to be jealous of each other.
Gary's son that didn't receive any money is insulted and feels betrayed and sad as well as angry and bitter about being cut off.