Why are men so nice to each other?

Men are not very jealous of each other. There is no envy, they do not gossip, they protect and help each other. It's like they hang out like siblings rather than friends. They really love each other. Their environment is more friendly and fun. But I started to disgust girls. It's all soggy words of love but they hate each other. Nobody can attract anyone. They are always selling each other behind their backs. I want to make friends with men. I'm tired of the hypocrisy of my own species.
Why are men so nice to each other?
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