The hiding the clothes and then returning them was always such a panic for me. Did I fold them neatly enough, had I forgotten exactly where they should be overnight etc.
There was a time that I thought nothing of it, because all of my clothes and underwear were the same sorts of things. As I got older I began to realise just how different everything my sister owned was, and that if she was putting an outfit together then she would definitely notice things were missing.