Not that actors and actresses opinions matter but the sentiment of many of the average person does reflect her statement where she says, " I don’t think it’s natural to be a monogamous person."

She is correct. Monogamous is not natural nor is giving up any sin. It is not natural. "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" (1 Corinthians 2:14). "There is a natural body, and there is a spiritual body" (1 Corinthians 15:44).