You shouldn't steal your roommate's things.
Jill notices that her roommate has a really cute shirt in her closet.
Jill wants to wear the shirt when she goes out.
Jill compliments her roommate on the shirt and asks to borrow it for a night.
Jill takes the shirt and fails to return it.
Jill's roommate feels validated in her sense of style and agrees to let her borrow it.
Jill's roommate notices one day and gets extremely upset.