Burn-in time Vs. Getting used to a sound

Again, I firmly believe that ther is electrical change that occurs in new electronics, but there are psychological principles that occur, whether or not you want them to, that can affect perception.

I am not an expert on this, or any topic, however, anyone with an electronic beckground would speak about dialectrics, and how they supposedly "burn in" -that is, change over time while the insulation material surrounding wires gets used to the electricity flow. Being a social scientist, I have often noticed the highly unscientific review methods that magazines use, along with there being many, many variables mentioned regarding electronics that are not quantifiable- no way to measure the variable on a real scale other than opinion. I must admit, that I believe to have heard lots of things myself that are not currently measureable by any instrument but nevertheless, affected a noticeable change on my stereo system. I have often wondered if there is not a combination of events, where, on the one hand, there is some electrical change in a component, but for the most part, ther is a user effect that is merely your idea of the sound of a particular component developing toward some type of schema that is a preexisting idea you, the listener, have about the particular piece of electronics. My guess is, we're better off not knowing, and I doubt that it could be proven either way. Someone, please, prove me wrong.... I think I need a "Black Mamba"