At a friend's college, lo these many years ago. I was visiting her, her college was coed but the dorms were not, and we were sitting with a bunch of her friends when a catfight broke out in the common area lounge. I later found out that it was over a third girl, but I was a little naïve back then, so I didn't grasp the significance until it was explained to me. Anyways, these two went at it with a vengeance, pulling hair, slapping, scratching, punching, and tearing at each others top. It was the residence assistance vs a senior coed, and they were out for blood. They went to the floor and rolled over and over, leaving a trail of hair and ripped clothing, finally ending up locked up, the girl on top determined to hurt the other girls sex with her own until positions switched and then the other got her sex punished. No one broke it up, and it went on for a while, especially when they were locked up and trying to hurt each other. Both were cursing, screaming in pain and crying, until the senior coed finally got the RA to quit. They untangled, and the winner staggered away, leaving the loser sobbing on the floor, holding herself. I had never seen another fight like that, before or since, but it was unforgettable.