Manhood is difficult to earn and easy to lose, results in experiments by University of South Florida psychologists suggest. Thus, the study goes on to say, aggression is the preferred way for men to hold onto their precarious status.
"Gender is social. Men know this. They are powerfully concerned about how they appear in other people's eyes," said Jennifer K. Bosson.
"And the more concerned they are, the more they will suffer psychologically when their manhood feels violated. Gender role violation can be a big thing, like losing a job, or a little thing, like being asked to braid hair in a laboratory," she added.
In one experiment, some men braided hair; others did the more masculine-or gender-neutral-task of braiding rope.
Given the options afterwards of punching a bag or doing a puzzle, the hair-braiders overwhelmingly chose the former.
When one group of men braided hair and others did not, and all punched the bag, the hair-braiders punched harder. When they all braided hair and only some got to punch, the non-punchers evinced more anxiety on a subsequent test.
Aggression is a 'manhood-restoring tactic', concludes the researchers.
Interestingly, Bosson also found that people tend to feel manhood is defined by achievements, not biology, whereas womanhood is seen primarily as a biological state.
Thus, manhood can be 'lost' through social transgressions, whereas womanhood is 'lost' only by physical changes, such as menopause.
She also added that the main punishers of gender role 'violations' are other men.
If Bosson is correct, the findings add weight to the notion that gender is a social, not a biological, phenomenon.
The study is published in Current Directions in Psychological Science.