Physical touch doesn’t make adults larger, but its pervasive effects are still coming to light. Field has published similar findings about the benefits of touch in full-term infants, and then children and pregnant women, adults with chronic pain, and people in retirement homes. Studies that involved as little as 15 daily minutes found that touch alone, even devoid of the other supportive qualities it usually signifies, seems to have myriad benefits.

The hug, specifically, has been repeatedly linked to good health. In a more recent study that made headlines about hugs helping the immune system, researchers led by the psychologist Sheldon Cohen at Carnegie Mellon University isolated 400 people in a hotel and exposed them to a cold virus. People who supportive social interactions had fewer and less severe symptoms. Physical touch (specifically hugging) seemed to account for about a third of that effect. (The researchers conclude: “These data suggest that hugging may act as an effective means of conveying support.”) Cohen and his colleagues continued to show other health benefits of physical contact, like a 2018 reveal in the journal PLOS titled “Receiving a Hug Is Associated With the Attenuation of Negative Mood That Occurs on Days With Interpersonal Conflict.”