Tim Brockley/Flickr

Some people really hate hugs, apparently.

Do you greet a stranger by kissing them on the cheek or giving them a firm handshake?

In the largest study ever quantifying where people were comfortable being touched and by whom, 1,300 men and women were asked the same question. The results suggest that when greeting most people, you’re better off with a handshake.

The participants, from Finland, France, Italy, Russia, and the U.K., detailed where strangers, family members, friends, and romantic partners were allowed to touch them. Researchers from the University of Oxford and Finland’s Aalto University then combined the results to create a so-called “heat map.”

(University of Oxford and Finland’s Aalto University)

For almost everyone, the hands are okay. Unsurprisingly, no one wanted relatives of any gender to touch their genitals. And, regardless of nationality, researchers found that the closeness of the relationship correlated with the range of areas that can be touched. There were, however, some unexpected results.

Robin Dunbar, an Oxford University professor who co-authored the study, tells Quartz: “We were a bit surprised at how reluctant men were [to be touched] compared to women.” The heat map showed that men weren’t even comfortable with other male strangers touching the back of their heads—it was a “taboo zone.”

The study, published in the journal Proceedings of the National Academy of Sciences, highlighted the importance of touch in communicating positive emotions. Humans are quite similar to monkeys and apes in that respect, where touch is crucial in establishing and maintaining social bonds.

There weren’t a significant number of cultural differences when it came to where participants would allow family, friends and strangers to touch them; but some nationalities were less enthusiastic about touching than others. True to their stereotype, British participants were right at the bottom on the touchability index.

To the researchers’ surprise, Italians were less comfortable with being touched than Russians.

“We hadn’t expected the Finns to turn out to be the most cuddly people,” Dunbars says, “or that the Italians are almost as uncuddly as the Brits.”

This post originally appeared on Quartz, an Atlantic partner site.

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