If I had a girlfriend, she would be listening to Bonzo on LZ1 on my stereo system whenever she is in the mood. Ked's girlfriend has to get on a plane and fly somewhere to hear Bonzo on LZ1 on someone else's stereo system. That might be fun because it involves an airplane and perhaps multiple partners, but it just kills the spontaneity. I don't think the girlfriend is confused about who is who.
I think you've stumbled on something monumental in evaluating high end audio components. It should be based on how comfortable one is when doing critical listening.