well ive been on both sides too, though reversed from mmccarthy, i was an 18st teenager and am know a 12st 7lb twenty something the extra energy i had was amazing, heck i could run for the bus without sweating buckets and i no longer had joint aches, other than the single perecentage figure who have genetic diseases, the rest are merely in delusion, sure some people are naturally chubbier than others, but chubby isnt obese, noone naturally weighs an eigth to a quarter of a ton which is what the majority of the fat acceptance seem to quote as their weight,

too try and tell people obesity is natural an healthy in most cases is just immoral self-delusion at best at worst its dishonest, if it were natural then countrys with a traditionally healthy diet such as japan would have the same levels of obesity as everywhere else.