12/17/2025
This 2022 Emory University study showed that testosterone—a chemical often linked to aggression—actually promoted cuddly, prosocial behavior between males.
“For what we believe is the first time, we’ve demonstrated that testosterone can directly promote nonsexual, prosocial behavior, in addition to aggression, in the same individual,” says Aubrey Kelly, Emory assistant professor of psychology and first author of the study. “It’s surprising because normally we think of testosterone as increasing sexual behaviors and aggression. But we’ve shown that it can have more nuanced effects, depending on the social context.”
From Emory University:
“In one experiment, a male gerbil was introduced to a female gerbil. After they formed a pair bond and the female became pregnant, the males displayed the usual cuddling behaviors toward their partners. The researchers then gave the male subjects an injection of testosterone. They expected that the resulting acute rise in a male’s testosterone level would lessen his cuddling behaviors if testosterone generally acts as an antisocial molecule.
“Instead, we were surprised that a male gerbil became even more cuddly and prosocial with his partner,” Kelly says. “He became like ‘super partner.’”
Neat!!
