School uniform
In some countries, like Germany, students can wear whatever they want whenever they want. It's common for many students to be naked around each other causing major erections in older classes. In other countries, like England and India there is usually a standard dress code in school, usually a set of dressing for girls and one for boys. Boys and girls need to wear school uniforms when they go to school. In many countries, such as the United States, some schools require wearing a uniform, and some do not.