everyone may know how to kiss. The question is, do you know there are many interesting aspects of kissing? Is kissing good or bad for you? How do people in Japan, France or other countries kiss? Can more kissing lose weight? Today we reveal 19 interesting facts about kissing.

1. Kissing can help women relax and relieve stress.

2. A warm kiss will tension 29 facial muscles, including 12 kinds of lip and 17 kinds of tongue muscles. In other words, kissing can be regarded as an effective way to exercise. It can make the skin smoother, prevent wrinkles and accelerate blood circulation. Perhaps the effect of kissing is better than using all kinds of skin cream or making facial mask. Of course, compared with the use of skin cream and mask, the process of kissing is much more comfortable.

3. One of every two people on earth has lost his first kiss before the age of 14.

4. Passionate kissing lasts for 90 seconds, which may increase blood pressure and speed up the pulse. In addition, kissing increases blood hormone levels and reduces life expectancy by one minute.

5. It is said that people who often kiss live five years longer than those who kiss with average frequency, and the latter is more prone to traffic accidents.

6. Kissing can exchange saliva between the two sides, including many different substances, such as water, enzymes, bacteria, fat, natural salt and protein. According to a new study, the exchange of these substances can stimulate a person’s immune system to produce antibodies.

7. Usually 66% of people close their eyes when kissing, while the rest are happy to watch their partner’s facial expression change.

8. Kissing can prevent dental plaque and caries, which is similar to that of toothpaste. Kissing can stimulate the secretion of a large amount of saliva. Saliva contains calcium and phosphorus, which can effectively prevent dental caries. Passionate kissers don’t get gingivitis easily. In addition, during kissing, the pH of saliva is neutral, which can also prevent dental diseases.

9. The sensitivity of lips is 200 times higher than that of fingers.

10. French kissing is called & ldquo; The union of souls & rdquo;. When French kiss, not only lips touch each other, but also tongues must touch each other. The French also invented a lot of passionate ways to kiss.

11. Eskimos kiss differently. They just rub their noses. Only when the olfactory organs of the kissing object touch each other, their lips open a little. Then, Eskimos take a deep breath and release air when their lips combine with each other. After enjoying each other’s smell, squeeze each other’s nose with their cheeks.

12. Kissing in public is generally considered impolite in Japan, Taiwan, mainland China and South Korea. Before kissing each other, two Japanese should maintain a certain distance, bend down, bow and kiss each other for one second.

13. Endorphin hormone is a good anesthetic. The more passionate kissing is, the more endorphins the body secretes. The hormone produced by a kiss is 200 times more effective in relieving pain than morphine. In addition, some other interesting effects of kissing are related to antibiotics. During kissing, saliva will automatically produce antibiotics, which can also produce anesthetic effect and make you forget the pain.

14. A quick romantic kiss may burn 2 to 3 calories, while a French kiss burns at least 5 calories, because the French kiss needs to open their mouth and touch their tongue. Scientists have announced that we don’t need crazy kissing to lose weight. Just three kisses lasting 20 seconds a day can help you lose weight.

15. According to American statistics, American women kiss an average of 80 men before marriage.

16. Whether you are left-handed or not, you usually turn your head to the right when kissing. If not, it means that you don’t have a good relationship with the kissing object.

17. Everyone spends an average of 20160 minutes (about two weeks) kissing in his life.

18. Every minute of kissing can consume 26 calories of energy in the body.

19. Kiss gesture is actually a way of greeting without emotion.