I've messed with a lot of my own files. Recent ones include a cock fetish file, for cocks in porn, and my own cock. And another includes a bum fetish file, for bums in porn, and my wife's bum.
I've had success with both to the degrees I train them with. But what I find interesting is when I'm turned on by my own cock, seeing it as sexy.
Makes me wonder how far one can be turned on by themselves, and whether you can get to a point where yourself is sexier and more fulfilling that other people.