'you'll find several references to poligamy, even better, they refer how a poor old guy had sex with his daughters and a younger maid, because "God couldn't make his old wife to be fertile".'

PM Noah did not have sexual relationship with his daughters and neither with a servant, he had none (servants) and his daughters were married. On the other hand, Abraham did sleep with his wife's maidservant at the suggestion of his wife, because his wife thought of herself as infertile, but in the end God gave them a son despite their old age.

Penny, as for the Bible, the New testament can be applied to the present age. And even some of the old testament books (proverbs to name a few).