It bothers and turns me off sometimes when I try to masturbate to my own imaginations because ultimately, I’m really just getting off to electric signals and neural chemicals. It is not my ex girlfriend that I am getting turned on by, but MY OWN mental representation of that person as an idea that is generated by my own consciousness…which makes masturbation completely self-absorbing.  You could also say that consciousness splits itself in half whenever you masturbate to your imagination, with one half of it acting as the director and producer of the mental pornography while the other half of your consciousness watches the product simultaneously.