Many who oppose "gay marriage" claim the Bible says God defined marriage as one man and one woman. However, the Bible says that Jacob married both Leah and Rachel, that David had many wives, and that Solomon had 700 wives and 300 concubines. All three of these men were supposedly favored by God.
Solomon was almost a marriage machine. He ruled about 40 years or about 14,000 days. We can probably assume that he didn't marry much near the end of his reign and probably married some of his wives before he became king. If his marrying days were still about 40 years, that would mean he would be marrying a woman every 20 days or marrying a woman or taking a concubine every two weeks. That sounds like Solomon's life was one continuous honeymoon!