That would still require him to listen to his girlfriend talk. With all the technological innovation available today, nobody should have to listen to their girlfriends talk.
Do you have any idea how hard it is to train partners to use your name once they fall out of practice? It's like there is a negative reinforcement stimulus applied everytime they do use your name.
I noticed that my wife stopped using my name when it became more ambiguous as to who she was talking to because our kids are now older and conversations (really instructions and queries) are at the "adult content" level rather then "child content" level.