And God has both raised up the Lord, and will also raise up us by his own power. For two, says he, Shall be one flesh. But he that is joined unto the Lord is one spirit. This sin against your body can lead to venereal disease. There are more than 1,000,000 new cases of gonorrhea and 120,000 cases of syphilis reported in America every year.
Sexual promiscuity seems to contain it's own backlash.
The bible leaves us with no if 's and buts in regard to marriage relationship. He could not live alone. He needed a helpmate, someone very much like him, and yet different from him. Someone who could make his life complete and meaningful. Adam was too much below God to have perfect fellowship with Him, and too much above animals to have fellowship with them.