Another difference in gender roles among the Qom appears in the way in which men and women display aggression. Traditionally, men would not engage in physical violence using their fists or weapons to hurt one another but rather would fight through a series of challenges to determine who was stronger. In the case that physical fighting did break out, other men would not interfere. In fact, only the intervention of a woman, particularly one with close ties to one of the men involved, could end the fight. However, for women, fights were often public and there was never any form of intervention. These fights were seen as spectacles and were often observed by various members of the group until one woman ceded or was sufficiently wounded. Additionally, women's fights differ from men's in the use of weapons. Traditionally, it was not uncommon for Qom women to use knuckle-dusters. These weapons were made from wood or pieces of hide and sharp objects such as piranha teeth or sharpened rocks could be added in order to cause more damage to one's opponent. Even among children, this difference between physical aggression between girls and boys has been observed in which young girls seem more aggressive and engage in physical fights more often than boys.