Here is my theory on obesity and overweight. In the USA starting in about 1980 the USA (5%) of the world population had more air conditioners than the rest of the entire earth population. The numbers of course have increased in the USA as well as other places. When it's hot and there is no relief, you don't want to eat. It's pretty much a fact. But sitting in an air conditioned, nice cool room, you can eat all you want. Give it some thought. It's my theory.