I think it goes deeper than that.  An obese person is one who never matured enough to learn how to say "no" to themselves.  Learning that just because you want something, like say an entire cake for breakfast, does not mean that you should have that thing, is a sign of maturity.  This is why I get annoyed when fats claim that their weight doesn't tell me anything about their personality.  Wrong!  It tells me that they never matured beyond the age of 6 and that they will impulsively give in to any urge they have.  It tells me that I can avoid a whole lot of drama and immaturity if I just avoid them.    Since they are emotionally and mentally like toddlers, I think they make similar fashion choices as toddlers.  I don't think many of them are intelligent or sophisticated enough to be dressing like children for a good reason.  Yeah, they think they look cute, but it never dawns on them to do that for other people.  They do it because a lime green shirt with Mickey Mouse on it actually appeals to them at their low mental level.