I know for most of us the source of our ab/dlness is more-or-less a mystery. While this is pretty much true for my DL side, I believe my ab side is at least partially due to emotional trauma during my teen years. One of my parakeets flew away (it was an accident but still my fault) and the next year my mother suddenly decided to euthanize my dog. Before that, it was stress from health problems that caused me to start sucking my thumb in the first place. And finally, I have received very little in the way of physical affection (hugs and cuddling) for the past 8 years or so.
So, does anyone else trace their ab/dlness to emotional difficulties?