Humans may not be as unique in their hygiene habits as previously thought. A new study published in Primates reveals that eastern chimpanzees in Uganda’s Budongo Forest regularly use leaves to wipe themselves after defecating—and sometimes even assist each other in cleanup.
Researchers documented the chimps not only engaging in post-poop hygiene but also cleaning their genitals after sex. In some cases, one chimp was seen wiping another’s body, demonstrating prosocial behavior. Lead researcher Dr. Elodie Freymann noted, “They aren’t just cleaning themselves; they’re showing that they care for themselves and each other.”
The study also observed chimps treating wounds by applying chewed leaves or pressing their fingers to injuries—some using plants with known medicinal properties. These findings challenge stereotypes of chimps as purely aggressive, highlighting their nurturing side.
“This mirrors human behavior in a nature-driven way,” Freymann added. The research underscores the complexity of primate social bonds and offers new insights into the evolutionary roots of hygiene and empathy.