They are going to need those social skills later in life, especially as they become adults. "My friends and I never thought of boys as real people in high school--they were like pets! So one of the best parts of going co-ed is getting to know and understand guys as individuals." this proves the opposite genders see each other differently if they go to a single-sex school. It would also make there be less drama in all girls classes by having boys in there too. Boys may also still act out in co-ed classes, but I think there would not be as much acting out with girls in the class