Why do men and women dress differently?”
In the Middle East, for example, traditional Turkish and Arab dress has men wearing dresses and women in trousers. In most world cultures, until recent years, there were no such people as independent women. All women belonged to someone: their husband, their brother or their father. Often, their costume suggested some degree of covering, to suggest that their bodies should not be seen by men outside a narrow group, the husband or the family. If you are interested in this topic, it might prove to be useful for you to buy a book on the history of fashion or costume. In passing, Western men are thought to wear trousers due to the prevalence of horse riding in European culture. Having said that, Roman troops rode horses and wore little skirts as they did so. They must have become quite sore!