Blog: Magical First Kiss

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A kiss is just a kiss  — or is it?

Whether you’re looking for love or happily coupled this Valentine’s Day, take a moment to ponder the incredible moment that is the first kiss.

Valentine’s Day is a day dedicated to lovers. And, as all lovers know, the magic starts with that first kiss. So what’s exactly happens in order for that perfect first kiss to become intoxicating?

Over 90 percent of lovers, irrespective of age, can remember exactly where and when the first kiss occurred. Moreover, that first kiss is a dealmaker or breaker because over 60 percent of first kisses, for both men and women, are a failure, terminating any chance for romance.

Well before that first kiss occurs, the eyes convey important information to the brain, which, in turn, has a tremendous influence upon our feelings associated with love. Next time you get a chance, watch how new lovers look at one another — it’s thrilling.

After the eyes have helped set the mood in the brain, just prior to approaching that first kiss, the prospective lover involuntarily tilts his or her head, either to the right or left. It turns out that about two-thirds of us tilt to the right.

It’s not right-handed related but rather correlated to head tilt direction while in utero as the fetus moves and tilts its head. Also, over 80 percent of nursing mothers cradle their babies to the left, thus the infant must turn its head to the right. Conditioning for feelings of love, affection and sustenance begin very early in our lives.

Assuming that first kiss feels just right, the brain nerves are now into overdrive, including hearing, seeing, smelling and tasting. Each one affects the expression on the lover’s face.

As the kiss heats up, blood vessels expand to allow more oxygen to the brain, breathing becomes deeper and irregular, and pupils dilate (likely explaining why many lovers close their eyes).

Invariably, there will be tongue contact, (more often than not initiated by the male, but more about that later). The tongue allows us to sample our partner’s taste with the assistance of over 9,000 little bumps (or taste buds) spread across its surface.

Now all five senses are sending messages to the brain; that is, tens of billions of nerves are firing rapidly throughout the body.

Lips are very sensitive to pressure, warmth and cold; they contain the highest concentration of nerve cells on our body. There are over 100 billion complex nerve cells liberally spread throughout the lips. They are the gateway to tiny neurotransmitter molecules that help trigger hormones including dopamine, oxytocin, serotonin and adrenaline.

That first passionate kiss causes dopamine to spike throughout the brain. It’s a give-me-more insatiable gene all about pleasure; when we first fall in love and have those over-the-moon thoughts, that’s dopamine. Incidentally, when we first fall in love, it affects the same part of the brain, giving us a craving just like cocaine. It also causes energy to elevate, loss of appetite, sleeplessness and even intoxication.

Oxytocin is a love hormone that is crucial in promoting affection and attachment so that when dopamine wanes, oxytocin surges. That’s why a kiss, hug or tender caress helps to maintain a strong sense of attachment for lovers. 

Serotonin controls our emotions and movement of information to the brain, as well as those obsessive feelings (like dopamine) and thoughts about our new lover. When that first passionate kiss brings love into our world, the high levels of serotonin mimic those associated with obsessive-compulsive disorder.

That first passionate kiss can cause some people to experience a sensation of weak-in-the-knees due to high levels of adrenaline, which is also spiking in the brain.

Women intuitively use that first kiss to assess whether a male is healthy and possessing “good-genes.” If that first kiss feels and tastes good, that’s an excellent start in a bonding relationship.

The other important link in determining whether that first kiss makes the grade is body scent. Not surprisingly, the highest concentration of scent or sebaceous glands are near the nose, face and neck. Each of us has a unique scent and the human nose is able to detect over 9,000 different molecules. When you press your nose over your prospective lover’s neck or jaw line, instinctively only you will know if their scent is just right.

Lastly, there’s a valid evolutionary reason why men slip women a wet, sloppy tongue kiss. Male saliva contains testosterone, a hormone in short supply in females. Just a few male testosterone molecules raise women’s libido, readying that passionate scene for intimacy.

All that … just in one kiss.

“Love is the solution.”

Earth Dr. Reese Halter is the author of “The Incomparable Honeybee and the Economics of Pollination.”