Kiss from a scientific perspective

In my life, most people have at least once kissed someone to show affection. And this gesture is especially popular among lovers. However, there are many interesting things that not everyone knows about this supposedly romantic habit.

Human lips differ from the lips of all other animals because they flipped inside out. However, humans are not the only species with kiss-like gestures. Large monkeys often press their lips together to show excitement, affection or reconciliation.

Scientists are not sure why humans kiss , but some argue that the answer lies in early feeding experience. Through breastfeeding and receiving food chewed by parents in some cultures (for example in Vietnam), babies can learn to relate to touching lips with an act of love. love.

Another explanation is given: A beloved cheek of a loved one has long become a social means of communication in cultures around the world, from New Zealand to Alaska. Over time, light touches may have become an additional practice for this tradition.

Reality shows that kissing is not universal. This fact makes some experts such as anthropologist Vaughn Bryant of Texas A&M University (USA) consider this to be really a learning behavior.

The earliest recorded evidence for kissing comes from the Vedas in Sanskrit in northern India, which was written about 1,000 to 2,000 years ago. A part of the Satapatha Brahmana mentions the lips of lovers.

According to historians, the Roman army has taken kissing to many cultures without this practice (perhaps after their political engagements have ended). Later, it was the European explorers who carried out that special propaganda.

To make a kiss, you must mobilize up to 29 facial muscles . In other words, kisses can be used as an effective exercise to prevent the development of wrinkles.

When kissing, couples exchange saliva containing many different substances such as fat, mineral salts and proteins. According to the latest research, the exchange of these substances may promote the production of antibodies against various diseases.

Statistics show that 66% of people close their eyes when kissing. The rest are interested in observing the emotions expressed on their partner's faces.

According to US statistics, a woman in this country kisses an average of 80 men before she gets married.

A romantic kiss that happens quickly will burn about 2-3 calories. Meanwhile, a French kiss (kiss with an open mouth and tongue contact) will make performers lose more than 5 calories.

A 1-minute kiss can help your body release 26 calories.

The sensitivity of the lips is 200 times higher than the fingers.

It has been suggested that men who kiss their wives goodbye before going to work will live for more than five years than those who ignore this gesture and hastily shut the door behind them. Men who do not have a habit of kissing goodbye to wives are also said to be more prone to traffic accidents.

Embracing kissing for 90 seconds will increase your blood pressure and make your heart beat faster . This action will also increase the amount of hormones in the blood, thus reducing our lifespan by 1 minute.

When kissing, the partner's body will produce a substance that has a narcotic effect 200 times higher than morphine. That's why people who kiss can experience feelings of euphoria and happiness that rise in intimacy.

Kissing can help women relax and reduce the effects of stress. Meanwhile, in men, a passionate kiss can also increase oxytocin hormone, which promotes bonding and attachment, according to research by behavioral neurologist Wendy Hill of Lafayette University. in Pennsylhovania, USA.

And a passionate kiss also has the same effect as belladonna in making our pupils expand.

On average, one person spends 20,160 minutes (equivalent to 2 weeks) in his life for kisses. And about 50% of people have their first kiss before reaching the age of 14.

Being close enough to kiss helps our nose appreciate compatibility. In a landmark study, evolutionary biologist Claus Wedekind of the University of Lausanne, Switzerland, said women like the scents of men with other immune-coding genes. Mixing genes in such a way can create offspring with a healthier immune system.

The study of Onur Gntrkn, a psychologist at Ruhr-Bochum University in Germany discovered, two-thirds of us tilted our heads to the right when kissing. This behavior may reflect head tilt trends observed in infants and even in the fetus.

Saliva exchange can provide a reproductive advantage for men . In an open-mouthed kiss, the man transferred a bit of testosterone to his partner. Over the weeks and months, repeated kisses can increase women's sexual desire, making women more sexually desirable. However, it should be noted that in one ml of saliva contains about 100 million bacteria.