Actually the bible dose say that the sons of God took earthly woman as wives. Their children became like giants. The sons of God were fallen angles, they did not create man but did take human wives. The reason for the flood was not so much because Noah was such a good guy. It was to rid the earth of a demonic population. The bible states that in the last days it will be like this again. UFOs are Satans way of approching man one more time. He is trying to get man to believe that he is from an advance race. The beings from these ships are very interested in human sexuality.