Despite our advancement in terms of technology and society as a whole, we are all slaves to our biology whether or not we like to admit it. We are all driven to reproduce and have offspring in order to pass down our genes. This is the basic drive, but there are several more subtle biological drives that affect our psychology.
One example that is important is that a woman loves when a man is capable of defending themselves and defending her. A simple act of the man standing up for the woman makes him seem more attractive. If a man gets punked and is unable to stand up for her or himself, the woman will lose respect for him. This is ingrained in women, as a male partner who cannot defend himself or his mate results in a reduced chance of successfully continuing his bloodline.