You shouldn't take other people's belongings.
Jane has stumbled across a cute looking skirt in her roommates room.
Jane wants to wear the skirt.
Jane approaches her roommate and asks her if she can borrow the skirt.
Jane simply takes the skirt and keeping it as if it belongs to her.
Jane's roommate doesn't really like the skirt, so she just gives it to her.
Jane's roommate sees her wearing the skirt and considers her a thief.