Nice post Lobie, but if only it was something that could actually be understood in a scientific manner. After many decades of studying this, after posting my own theories and understanding, and continually reading and trying to learn what the psychiatric and scientific world sees this as... I am convinced there does not exist a real and complete description of what being ABDL is. It is like trying to describe the Grand Canyon to someone who has never seen it. You can say it is a deep and beautiful canyon with lots of colors and rock formations and the like, but you will never fully describe or understand it unless you have experienced it yourself. And then, even then, it will be impossible to provide the correct words that will capture what it is as it changes from season to season and from visitor to visitor.
You gave a good overall description, and I appreciate your sharing, but again, I am convinced that there does not exist a sound understanding of the facets of what this really is and what it is all about.
Its a process of learning and for each of us it is slightly or greatly different. For me, it is not a fetish or paraphilia as what it used to be understood as. As I read more about what this means and the sexual nature of fetishes or paraphilia, I throw this out as trash. As there may be a sexual component, but it often may not. So clumping it as something that IS, is not fully correct. Like clumping in one who likes shoes as having a fetish, but in reality, they just like shoes and don't have sexual feelings towards it. Are there shoe fetishists, well yeah, but that doesn't make everyone who is into shoes a fetishist.
It is in a category that is really, or in my opinion, really should be its own category. We who are ABDL just are. We exist, we have the desire to wear diapers and regress at times (or not) or we might just like feeling babyish, or just the feeling of wearing a diaper. That is a broad spectrum and only hits upon a small part of the full diversity of what ABDL or DL folks may feel. To some is it a fetish, I know it is. But again, that doesn't explain or say that it is a fetish for others.
Hence, it just is. Better to accept yourself and your feelings for who you are and what it means to you, than try to clump everyone in a box where you don't really fit.
Is it a bad thing to try to understand it and consider what psychologists and other "professionals" may have concluded? Well no, but the fact is that they haven't yet gotten it perfect, so I would caution folks to take these studies with a grain of salt. They have some good points and rationale, but they haven't gotten it right yet. Nor I highly doubt they ever fully will.