You shouldn't take advantage of your roommate's things.
Sophie is home alone and notices that her roommate Amber left her cigarettes on the table.
Sophie wants to smoke a cigarette.
Sophie texts Amber to ask if she can smoke a couple of the cigarettes left on the table.
Sophie opens up the pack of cigarettes that Amber left and smokes all but one of them.
Amber has no problem sharing with Sophie and thanks her for asking before she just took some.
Amber feels betrayed and is angry at Sophie, demanding she pay for a new pack.