ctrl bhai, being fat and being obese are two different things. The later cuases health problems. Obesity is rare in Indians and highest among americans (1 in four children in US are obese).
Tom, what you said about obese people is right. They dont know when to stop eating. The only remedy for this is to make the brain realize that the stomach is full. There is extensive research going in this field and many guinnea pigs are being starved (CCMB has a patent for these obese guinnea pigs). The results are good, but this is not the best solution. There is an alternative.
The alternative is to let the obese person eat all he wants and alter the digestive system so that nothing is digested and everything is excreted as is. This is
the best solution. A Italian scientist has found out that a small electric pulse of specific frequency when given to the intestine/organs stimulates the organs and makes the person to go to potty frequently. This way the food is not digested and is excreted. the results are good, a 300 pound woman lost around 100 pounds in a week. This procedure requires implanting electrodes inside the body, and the associated circuit to generate the pulse, by surgery. However there is a problem - the power supply. This procedure requires a rechargeable battery to be implanted inside the body and it needs to be recharged every few hours. So after the surgery the patient will have two wires coming out of his body, which needs to be plugged into a socket
Efforts are on to replace the current system with a bio-implantable remotely charged circuit. This system is to be used on extremely obese people only and needs a surgery.