Why do Americans struggle with watching their weight while the French, who consume rich food, continue to stay thin? Now a research by Cornell University suggests how life style and decisions about eating may affect weight. Researchers conclude that the French tend to stop eating when they feel full. However, Americans tend to stop when their plate is empty or their favorite TV show is over.

According to Dr. Joseph Mercola, a health expert, the French see eating as an important part of their life style. They enjoy food and therefore spend a fairly long time at the table, while Americans see eating as something to be squeezed between the other daily activities. Mercola believes Americans lose the ability to sense when they are actually full. So they keep eating long after the French would have stopped. In addition, he points out that Americans drive to huge supermarkets to buy canned and frozen foods for the week. The French, instead, tend to shop daily, walking to small shops and farmers' markets where they have a choice of fresh fruits, vegetables, and eggs as well as high-quality meats for each meal.

After a visit to the United States, Mireille Guiliano, author of French Women. Don’t Get Fat, decided to write about the importance of knowing when to stop rather than suggesting how to avoid food. Today she continues to stay slim and rarely goes to the gym.

In spite of all these differences, evidence shows that recent life style changes may be affecting French eating habits. Today the rate of obesity among adults is only 6%. However, as American fast food gains acceptance and the young reject older traditions, the obesity rate among French children has been growing.

Forcing waiters and waitresses to survive on tips from customers rather than normal wages is a pointless, crude, and unique American custom that, in the past several years, a handful of progressive restaurant owners have attempted to do away with, often with positive results. On Wednesday, one of the most famous names in the dining business says he’s about to join their ranks. Danny Meyer, CEO of Union Square Hospitality Group, has announced that he plans to gradually eliminate tipping at the company’s 13 restaurants and charge higher menu prices in order to pay staff fairly. Diners wont simply be discouraged from leaving a tip; their checks won’t even include a line to write one in.

What, exactly, is wrong with tipping? As Danny Meyer has explained, more or less it’s everything. To start, leaving a waiters pay in the hands of variable customers has a feeling of classism. And in theory, handing restaurant customers the power to tip is at least supposed to motivate better, more attentive service. This fails in practice because humans turn out to be pretty personal about their tipping behavior. Research has shown the amount diners leave has little to do with their level of satisfaction. All of this doesn’t encourage waiters and waitresses to do anything but turn over as many tables as possible.

Tipping is also very unfair to kitchen staff. The law allows restaurants to divide tips between front-of-the-house workers like waiters, hosts and hostesses, but not cooks. This creates a system in which the people serving the food in a restaurant can earn more than the people preparing it.

Unlike some restaurant owners who have taken an anti-tipping stand, Meyer won’t simply add a standard extra charge to diners’ bills. Rather, Union Square Hospitality Group intends to raise menu prices enough to fully cover the cost of a meal. If Meyer manages to move away from tipping at all without hurting his profits, it would almost certainly set the stage for others to follow suit.

Whether you’re eating at a fancy restaurant or dining in someone’s home, proper table manners are likely to help you make a good impression. According to a US expert, Emily Post, “All rules of table manners are made to avoid ugliness.”

While Henry Hitchings of the Los Angeles Times admits that good manners can reduce social conflict, he points out that mostly their purpose is protective — they turn our natural warrior like selves into more elegant ones.

So where did table manners come from? In medieval England, a writer named Petrus Alfonsi took the lead to urge people not to speak with their mouths full. And King David I of Scotland also proposed that any of his people who learned to eat more neatly be given a tax deduction (减除).

Disappointingly, that idea never caught on. It was during the Renaissance that there were real technical developments, and opinions of correct behavior changed for good. “None of these was more significant than the introduction of the table fork,” wrote Hitchings. “Gradually, as forks became popular, they brought the new way of eating, making it possible, for instance, to consume berries without making one’s fingers dirty.”

Forks were introduced to Britain in 1608 and 25 years later, the first table fork reached America. Yet while most of the essentials are the same on both sides of the Atlantic, there are a few clear differences between what’s normal in the US and what holds true in the UK. For example, in the US, when food needs cutting with a knife, people generally cut a bite, then lay aside the knife and switch the fork to their right hand. Then they pick up one bite at a time. By contrast, Britons keep the fork in the left hand and don’t lay the knife down.

Though globalization has developed a new, simpler international standard of table manners, some people still stick with the American cut and switch method. The Los Angeles Times noted, “They are hanging on to a form of behavior that favors manners above efficiency.”