Sexualization of girls in Christian schools

Throughout my life I attended Christian Schools up until my junior year of high school. ( One for elementary -middle and one for high school).In both schools there were constant talks about what girls wear and how they could lead boys and men to have “bad thoughts”. One conversation I remember remarkably was during my freshman year of high school. It really disgusted me. During the first day of school they had all the girls come to the gym and one of the female teachers had a talk with all of us. She told us that it is important for us to wear long skirts and preferably pants because if we didn’t it could cause the boys in our school to “think about us a certain way”. She even went as far as to make up a fake scenario where if a man was dropping a delivery off to the school and he saw a girl in a short skirt it would lead him to have “misleading thoughts.” The justification behind all this was “ This is just how God made us to be. Women should help out the men by covering up.We are different and we have different priorities .” When will these conversations stop and why is the responsibility on the girls instead of boys. This argument is so tired.