Okay, I have toying around with this theory for awhile now. I think there is a direct link with DL and TB/ABism and your social placement. For example...
This girl in my Class, Her dad died when she was 7, she is VERY popular, a cheerleader, drinks every weekend, and has tons of friends. I think that she MAY be a DL and/or a TB. Why? because with loosing an influencial figure so young inflie, she may feel that she never had a "normal" Childhood, thusly feeling the need to regress. Same goes for being a DL, she may need a way to deal with the stress of school, sports, grades, friends, drinking, partying. Therefore, she might put on a diaper and release stress that way.
Same goes for the "looser" or "Geek" they may have little to no friends, unpopular, no girlfriend/boyfriend. So, they need to feel "loved" or "accepted" somehow. They may do this put tapping up a thick diaper and feel secure and accepted while wearing it.
So, with this theory, it states that the upper and lower socail class are the ones more likely to be a TB, AB, or DL. Now...what do you guys and gaks think???