If a mother has weak and confusing frame, her son will be lost and trapped in it and never grow. If a mother has strong and clear frame, her son will grow in strength in order to break free and create his own frame. Strong mothers make strong sons.
A father takes that son and makes him a man. But a mother who twists and corrupts her son with her own weakness sets up a flawed child unlikely to survive the rigors of forging required to craft a man.