What is it about 'fighting it out' that helps men move past issues with each other?

"I love you man. You know what I mean."
"I love you man. You know what I mean."

We woman hold grudges. I can't see being bloodied and bruised solving any of our spats. Can you explain this to the class?

What is it about 'fighting it out' that helps men move past issues with each other?
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