Hello,
First, I would suggest a more developed thesis. One of the things I always ask students is the "so what" question. THis question focuses on the "why" aspect of your essay and will help you fashion well-developed body paragraphs that support your thesis.
Why should boys be able to wear a skirt to school? Why should this idea not seem "weird" to others? Currently, this idea is way too broad. I would suggest spending some time to answer these questions so you can narrow your argument or topic. It is a lot easier to write body paragraphs when you have clear ideas and thus a clear structure to follow. If you brainstorm "responses" or ideas that you want to argue in your essay, you will be a lot closer to writing these body paragraphs.
I am available if you need further assistance. Please don't hesitate to contact me if I can help in any way. I'd be happy to help you write and revise your body paragraphs.
I hope this helps
Best,
Wenwei