Yes absolutely there is not nothing wrong with it
If you are a boy, and you have a sister that wears your clothing, you ask, I can wear your clothing because you wear mine.
They can wear what they like once they are paying for their own clothes. There are no laws that prohibit this.
If they want to. Might get teased a little. Might be mistaken for gay in most societies. But there's nothing bad about a little fashion freedom.
Yes, skinny jeans and tight hoodies and banana hammocks.yes skinny jeans and tights , skrits