Eating is a way of life, but when you eat to much and become (no offence) horizontaly challenged, it is a different story. Eating too much can cause fats to block the heart, resulting in heart attack. But for some people, it is in their genes. They are (sadly), born obese. Fortuately, these cases are very rare. Some people (like me) eat a lot, but, do not get obese so easily as they have high metabolism rates which burns fats much quicker than normal and increases the temperature inside their bodies. That explains why I could survive in China which was 3 degrees celcius, by wearing only 1 or 2 layers of clothing.