54% of Cultures Don’t Kiss Romantically: Discover Their Unique Expressions of Love

Kissing is one of the most intimate acts between humans, yet its origins remain surprisingly enigmatic. When we discuss kissing, we often refer to the romantic lip-to-lip contact that involves suction and pressure, but that description lacks the allure often associated with this act.

But what drives humans to kiss?

Throughout history, the significance of kissing has varied across cultures. The earliest documented kiss can be traced back to ancient Mesopotamian texts from 2500 BC.

In ancient Rome, three distinct types of kisses existed: the palate, a friendly kiss on the cheek; the Basium, a platonic kiss shared between family and close friends; and the Sabium, a passionate kiss exchanged by lovers.

Clearly, kissing transcends mere romantic expression.

Despite its prevalence, kissing is not a universal practice. A 2015 study of 168 cultures published in American Anthropologist revealed that only 46% of people engage in romantic lip kissing. Cultures that do not incorporate kissing have alternative ways of expressing intimacy.

Despite appearing to be universal, less than half of global cultures actually practice romantic kissing – Photo credit: Getty

On the Trobriand Islands near Papua New Guinea, a couple may nibble each other’s eyelashes. Interestingly, during his explorations, Charles Darwin noted a particular Malayan kiss in which individuals squat and smell each other, implying that scent plays an important role in human intimacy.

Can biology provide insights into the reason we kiss? Research suggests that kissing serves a biological bonding function and facilitates emotional release through the release of oxytocin, hormones linked to trust and attachment.

Oxytocin reduces stress, fosters intimacy, and strengthens the bond between romantic partners, suggesting that you kiss because it feels good.

According to evolutionary theory, the origins of lip-to-lip kissing may stem from early maternal behaviors such as breastfeeding and pre-chewing food to feed infants directly.

This behavior is still observable among primates like chimpanzees, potentially laying the foundation for lip contact as a signal of care and bonding.










Human infants are biologically inclined towards lip contact, associating it with comfort and safety. This may have evolved into broader social behaviors linked to caregiving and emotional bonds.

However, theories emphasizing maternal lip-to-lip behavior may fail to fully explain romantic kissing.

A provocative recent theory by evolutionary psychologist Dr. Adriano Lameira of the University of Warwick proposes that kissing evolved from grooming behaviors.

In primates, grooming often culminates in oral contact, such as removing fur from one another. Lameira’s hypothesis suggests that as humans lost body hair, grooming became less feasible, leading to shorter grooming sessions and the enduring practice of kissing as a form of affection.

Indeed, kissing is a complex behavior, potentially shaped by the actions of our ancient ancestors. Whether it be the passionate Sabium or the simple pleasure of closeness, kissing addresses a profound human need for connection.


This article answers the question, “Why do we kiss?” as posed by Dani Castillo through email.

If you have more questions, please reach out via email: questions@sciencefocus.com or send us a message Facebook, Twitter, or Instagram (remember to include your name and location).

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Source: www.sciencefocus.com

Orca Captured Engaging in a “Tongue Kiss” in the Wild for the First Time

In a remarkable encounter with citizen scientists off the coast of Norway, a duo of orcas was seen engaging in “kissing” behavior in the wild for the very first time.

The footage captured by the group displays the pair gently nodding at each other, accompanied by “tongue nibbling.”

While similar behaviors have been documented before, this marks the first instance of such interactions being observed in a natural habitat.

During the video, the orcas came within 10-15 meters (30-50 feet) of each other, sharing three brief moments of affection above the water’s surface for a duration of two minutes.

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The footage captures a serene moment of connection between the two whales.

“This behavior has only been documented in orcas under human supervision,” said Dr. Javier Almunia from Loro Parque in Spain, as reported by BBC Science Focus. He was part of a recently published study utilizing observation videos from marine environments.

“Witnessing it in the wild indicates that such intricate social behaviors extend beyond captivity and are likely integral to the species’ natural social behavior.”

Orcas are known for their strong social structures, employing intricate behavioral systems to form and maintain social relationships.

For marine biologists, these observations are crucial for understanding orca interactions.

“Gaining insight into the social behavior of wildlife is essential for understanding their communication, bonding, and cooperation—key elements for their survival and well-being,” noted Almunia.

Unfortunately, these wild behaviors are rarely seen and require a fair amount of luck to witness at the right moment.

While studying animals in captivity is safer and more accessible, their behaviors often differ significantly from those observed in the wild.

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Orcas in captivity have previously been observed “nibbling” their tongues at each other.

A Remarkable Encounter

The video was filmed on January 11, 2024, when two whales were observed by a fortunate group of snorkelers diving in Kavanangenfjord, northern Norway.

This area is known as a gathering spot for marine mammals, making it an ideal location for observing orcas due to its clear waters.

The group had the opportunity to watch the orcas under the guidance of experienced expedition leaders.

However, the study emphasized that while tourist excursions can lead to valuable scientific observations, “it is widely recognized that activities like whale watching and swimming can pose significant risks to wild populations.”

Orcas, often referred to by the misleading nickname “Killer Whale,” actually belong to the dolphin family. The latter portion of this nickname is accurate, as all dolphins are categorized as “toothed whales.”

Nevertheless, the term “killer” is misleading, as there are no documented cases of wild orcas intentionally harming humans.

The name stems from an ancient mariner who observed orcas hunting other large whales.

“They were originally called ‘whale killers,’ a term that evolved into ‘killer whale’,” explained Almunia.

“While orcas are indeed apex predators, they are also incredibly intelligent and social animals with complex cultures and strong familial bonds. They play a critical role as top predators within marine ecosystems.”

About Our Experts

Dr. Javier Almunia serves as the director of Loro Parque Fanfacion, a Spanish organization dedicated to the conservation of endangered parrot and marine species. He specializes in cetacean biology and has participated in numerous initiatives aimed at preserving biodiversity and protecting endangered species.

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Source: www.sciencefocus.com