But deep down she said to herself, Franz maybe strong, but his strength is...

But deep down she said to herself, Franz maybe strong, but his strength is directed outward; when it comes to the people he lives with, the people he's loves, he's weak. Franz's weakness is called goodness. Franz would never give Sabina orders. He would never command her, as Tomas had, to lay the mirror on the floor and walk back and forth on it naked. Not that he lacks sensuality; he simply lacks the strength to give orders.
There are things that can be accomplished only by violence. Physical love is unthinkable without violence.