Eventually, his third wife Jane Seymour gave him Prince Edward to satisfy that obsessive desire.
This was true in the days of Henry VIII.
Traditionally your line is carried on through your name.
There is also research showing marriages with sons are less likely to break down than marriages with only daughters.
Today, modern men are generally reluctant to admit they want to father boys.
They dont want to upset their partner or seem ungrateful at the arrival of a baby daughter.
But evidence suggests deep down they only want a son.
This story sounds like a radical example of that.