High-functioning autistic here, though many people I know say they never would've guessed the fact...the only noticable afflictions came in the form of a short attention span and limited social skills, which kept me out of the dating scene until about 8 years ago (though both have improved greatly over the years). Typically, if there's something I like, I'll end up memorizing a plethora of info about it (music, TV, world capitals, etc)...it kinda becomes an obsession for me.
Anyway, I wonder if there's something that ties the whole fetish thing into it..."vanilla" never really did anything for me, then I learned about the whole AB/DL thing and something about playing "daddy" to a cute girl in diapers just turned me on, which led me here. :-) The idea of a possible connection is def worth considering...