Why can't a boy and a girl fight?

Because boys are stronger than girls and if they fight against eachother, the boy could knock the girl out at the speed of light. Not only that, but if he hurts her too badly or more than enough... she could die. then what? Its better off not to fight and get along. Its either get along... or don't look into eachother's eyes ever again. Fighting is not an option between opposite genders.