She lets her feelings be known
She doesn’t hesitate to let a man know when he has hurt her, or when he is being stubborn or irrational. She speaks up for herself, and is willing to do the work (via communication) to get what she needs. When a woman isn’t willing to speak up for herself, this says to a man that she is desperate for a boyfriend–so desperate, that she doesn’t want to stir up a fuss. And that is not attractive.