Hockey. All dudes... but why?

Went to my local mall to watch a hockey game and walk and shi. Noticed at that time and my past memories of men punching each other on the hockey rink... and I'm sure women can punch each other if it came to it. Sooo why is usually men playing hockey? I'm sure my brain can come up with the answer but what do you guys think?

Hockey. All dudes... but why?
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