They wore them to show that they were brave.
Such trophies were worn by all the brave men.
These men were the leaders in time of danger.
When they were successful in the hunt, the people praised them.
When they failed, the people mocked them.
So they tried to do their work well.
They tried to find the best stones for tools and weapons.
They worked until they made them sharp and strong.
They studied the animals until they learned their ways.
They taught the people the hunting dance.