[AnonymousGriper]

I just showed you specific genetic conditions that lead to excess body fat without over-eating. You have to reckon that. Science doesn't work that way. You can't just ignore evidence that counters your hypothesis, waving your hands and saying "pah, these exceptions to the rules." On a similar note, do you think most females develop breasts because they consume more calories than they expend (v.s. males)? By your line of reasoning, you should believe that.

[Lost_BiomedE]

"Like many other medical conditions, obesity is the result of an interplay between genetic and environmental factors. Polymorphisms in various genes controlling appetite and metabolism predispose to obesity when sufficient food energy is present."

http://en.wikipedia.org/wiki/Genetics_of_obesity

Over-eating is required.

[refurb]

None of your links actually support the idea that you can become obese without eating excess calories. They are all genetic diseases where obesity is a symptom of the disease. Maybe because they eat too much?