It's wrong to break up with someone over the phone.
Alex has a crush on one of his co-workers and wants to date her, but he's currently in a relationship with Casey.
Alex wants to break up with Casey.
Alex invites Casey over to his house and has a face to face conversation with her about why their relationship isn't working anymore.
Alex calls Casey on the phone and tells her that their relationship is over.
Casey is upset, but she appreciates Alex's honesty and considers remaining friends with him.
Casey is appalled at Alex's behavior and calls him a coward.