Here in the North you have already problems to get XXL size for shirts. Why? Walk on the street and you will never see a "heavywight". Here is no KFC, MacDonald, and nearly no fastfood. Furthermore here are lots of hilltribes who must work hard for their own food or go/walk long ways through the mountains. They don't have a nightlife with open pubs on the mainroads, consuming a lot of beer.
But walk here through our village on the main road, you will forget all ladies in the bars, nighhtclubs, beauty saloons etc, you will see slender young (boys and) girls. They don't need plastic surgery, they are slim, beautiful by nature. They easily can hide their bodies behind the fat bodies of the townspeaple or fat falangs!