The secret of kiss

Kiss is not simply a way of expressing feelings of lovers, but also contains many surprises, bringing health benefits to people.

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Origin of words . 'Kiss' comes from ancient English called 'cyssan' , no one knows where it comes from but many believe it describes the sound of kissing. The Romans had a few words to name different types of kisses, kissing their hands or cheeks called osculum, kissing lips called basium, a passionate kiss called saviolum.

10% of the world does not kiss . Mangaia is the oldest island in the Pacific with about 18 million years old. Residents of the island have never heard of the word "kiss " until they began to learn English in the 1,700 years. Currently about 90% of cultures in the world allow kissing, 10% do not do so for many reasons. For example, some parts of Sudan refuse to kiss because they believe the mouth is the window of the soul, they fear their souls will be stolen when they touch their mouths with their mouths.

Eskimos living in the North Pole rubbed their noses against each other instead of kissing their mouths. They believe that doing so will not freeze with each other due to extreme cold weather. Eskimo people only contact with eyes and nose, this is the method of expressing their own feelings.

How is the kiss spread all over the world? The scientific world of uncertainty about kissing is an instinctive or experienced behavior. Many people believed the kiss appeared when the mother chewed food in her mouth and transferred it to her mouth, similar to birds.

Kissing is a romantic gesture found in poems from the Sumerian era, one of the earliest civilizations in the world. Kissing is also described in love poetry in ancient Egypt. Historians believe that kissing behavior may spread when Alexander the Great invaded India, where the kiss was popular for centuries. Kissing described in Vedas is 'verbal touch' . Alexander brought knowledge of the kiss to the Western world, since then kissing behavior spread throughout the world.

Kissing in animals. Chimpanzees and many other primates are also involved in kissing behavior similar to humans. In addition, elephants are one of the most intelligent and emotional animals on earth. At a difficult time like the death of a member of the herd, the elephants would rub their taps into another child's mouth, as a gesture for both of them to comfort each other.

Kiss has many health benefits . Some studies show that kissing is really good for people. Most bacteria in the human mouth are identical, only 20% are different, each kiss will help strengthen the body's immune system.

Good kissing for the teeth, increasing the flow of saliva, cleaning plaque, reducing gingivitis as well as tooth decay, keeping teeth white and bright. Kissing helps to lower blood pressure because more blood vessels expand. Many diseases like herpes, the common cold, and even meningitis can be spread through kissing. However, these cases are rare, scientists say the benefits of kissing far outweigh the risks it brings.

Science of kisses . The field of study on English kisses is called philematology, research often focuses on biological mechanisms, related hormones and the reason people kiss. Most people tilt their heads to the right when kissing.

Kisses convey taste, sound and touch, all affecting each individual's perception, making them want to kiss again. People have very sensitive lips, have more nerves than most other parts of the body.

The kiss is related to all 34 facial muscles. The most important muscle during kissing is Orbicularis, which helps the mouth and lips to change shape when kissing. The researchers report that the average time people kiss each other for about two weeks. Most people burn about 1,560 calories per hour of kissing, of course depending on the different types of kissing.

Record of kiss . According to the Guinness Book of Records, the record for the longest kiss belonged to Ekkachai and Laksana Tiranarat in Thailand. Both of them locked each other's lips continuously during 58 hours 35 minutes 58 seconds.

Chemical process occurs when kissing . The kiss releases a chemical called dopamine, which is a powerful hormone that affects the same brain area as cocaine, making people feel good and refreshed. When kissing someone for a long time will release oxytocin hormone, feeling very peaceful and relaxing.

Prohibited kissing in public . Now in some countries, it is illegal to kiss and show affection in public. For example, in Mexico's Guanajuato state, this is considered pornographic and strictly dealt with. In some countries there are even more severe penalties. In 2010, in the Kingdom of Saudi Arab, a man was sentenced to 4 months in prison for hugging and kissing a woman in public.

Afraid to kiss . Many people feel frightened when they give their first kiss to someone. However, when there is more experience, restless feelings like the first kiss will fade over time. In particular, a few people encounter obsessive syndrome, afraid of serious kissing called philemaphobia . This can happen when someone is raped and sexually abused.

2 of 3 people tilt their heads to the right when kissing. According to a recently published report by Nature, people tend to tilt their heads to the right when kissing each other instead of leaning to the left. A scientist from Ruhr University in Germany analyzed 124 couples kissing and 65% of them tilted their heads to the right when kissing.

65% of couples tilt their heads to the right when kissing.

Neurons help us kiss in the dark. In the 1990s, a team at Princeton University discovered that some Premotox neurons in the cortex do two closely related tasks when they help you realize the sense of touch. and be aware of the areas around your face. This may explain why you can still find the lips of someone you love even when the light is off.

Kisses help reduce stress and feel safe. Over time, kisses will reduce the concentration of cortisol stress hormones, making you feel safe and protected. The longer you stay with one person, the more secure and secure you feel.