Well, I’m not a fan of physical age regression, but I am a fan of mental age regression, and diaper play can fit well in either of those categories. Beyond that, I’d say my interest in them trends not towards humiliation but more towards general slobiness, which I suppose would be along the same lines as loss of control. I my self have never worn a diaper, nor am I particularly inclined to ever do so. None of my fetishes escape fantasy for the most part, which is fine with me.