Is Monogamy just another form of selfishness?

As I was talking to my friend, I came to the conclusion that maybe the need to be monogamous stems from the need to have some one all to ourselves. In most situations a friendly relationship turns ugly when the two decide to be monogamous. Women often say men have a problem with commitment, but could it be possible that our issue is feeling like some one owns us. And from what my female friends tell me; when a man is eager to be in a relationship, he soon becomes controlling. I put forth the question. Are we monogamous for the right reasons, or is it an extension of our selfish nature?

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