Of course, nycindie, you feel different when called by a different lover's name, for psychological reasons. However, I think the examples were simply trying to say "being called by another name doesn't mean you're not special or loved".
I have to say that from the person saying the wrong name's side, it is definitely more embarrassing to use the wrong name for a lover than calling your roommate your cat's name. Actually, the level of embarrassment is only equal to calling a teacher "mom" or "dad" at school, I would say. All the rest can be brushed off more easily, but these mistakes can have implications that are not always comfortable to contemplate.