Powerpoint.
Start with pictures of people in uniform - show a fireman or a doctor or a judge or a priest.
Ask the kids to write down some characteristics about that person.
Chances are, they will say the firefighter is “brave”, the doctor is “compassionate”, the judge is “wise” the priest is “holy”, etc.
Then, show some pictures of young ladies in less-than-modest clothing - ask what charachter traits they think THAT person has.
Show them how what we wear on the outside sends a message to those around us.