Scientists have proved that every man needs a good night out with his friends.
According to the research, male bonding is more likely to lower a man's stress levels than a night out with his partner, or time spent with the family.
The study, by scientists from Germany's University of Gottingen, found males suffer less anxiety when out in a group.
Scientists studied groups of Barbary macaques, a type of ape which exhibits human-like social behaviour.
Levels of male stress hormone soared when male macaques were with their partner or other family members. But when they were in a group of other males, they were more much more relaxed.
Christopher Young, of the university's Primate Social Evolution Group, told the Telegraph: "If male primates live in multimale groups they usually fight fiercely over access to females, but males can develop friendly relationships with a few group mates.
"Male macaques form social bonds similar to human friendships that buffer them against day-to-day stressors."
