Is monogamy natural?

Is monogamy natural? Scarlett Johansson says no

That's right. Actress Scarlett Johansson says monogamous relationships are not natural “I might be skewered for that, but I think it’s work. It’s a lot of work. And the fact that it is such work for so many people — for everyone — the fact of that proves that it is not a natural thing.”

My first reaction was “another Hollywood personality spouting about morals and ethics.” But with a little reflection, I thought, “You know, she is right.”

Here it is, in the Bible:

• 1 Corinthians 2:14 “But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.”
• Ephesians 2:3 “Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others.”
• 1 John 2:16 “For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world.”