Men who beat up women are probably the most insecure. Men could be perfectly normal outside and confident all-around, but transforms when being alone with their partners. Often times, they do not know how to control their emotions, ending up being violent and hitting the women. Other times, it’s due to them not knowing how to convey their anger, so they went full barbaric on the women. This insecurity as well is worsens when they start suspecting that the women will throw them under the bus or even met up with a new love interest. That insecurity from jealousy leads them to further physically abuse the women. That fear of losing the women leads them to violence. This is also why arguments are often the leading cause to the physical abuse, inability to convey their feelings, refusal to lose due to ego, frustration from relationship tension and finally, physical violence because of anger. Mind you, this happens the other way round as well, from men to women, so it’s not a problem strictly by gender, but by terrible control of emotions.