Laws and Rules - monogamy

Having been in a the midst of a discussion about the "needs of men" as perceived by women, I wondered if this point of view was valid or not.

They were saying (the women) that men have the need to watch any moving pair of legs. That we (the men) are uncontrolled. That our instincts make us irracional.

I don't deny. It's mostly true. But why did they mention this in a negative way?

Aren't we all animals? Wasn't it that same instinct that brought the man close to the woman in the first place? Or was it a racional thought?

"Oh! That fine looking lady would be perfect to bare my children. She is so inteligent."

Why do we criticize one action just because it's inconvenient to us?

Society plays many tricks on us. We constantly make rules to confine our instincts. You would have thought that after a few thousand years making rules and laws we would have it right by now.

So why don't we??

Is it just because we need to give some people work? Or is it because that the rules are wrongly made in the first place?

Why does it constitute a crime, in most of the western countries, to marry more than 1 person?

Why are people restricted all the time?

Rules are nothing more than restrictions. Some make sense. Most of them do not.

Mankind is not monogamous. So why should society impose it?

Mankind is not the marrying type.

It all boils down to the frustrated people. Why are they the ones to settle the laws?

Shouldn't rules and laws be dictated by the "normal" people?