Mark Gungor’s introduction that he wrote in this wonderful book The Bead Method:
Marriage, at its most basic foundation, is a sexual contract. Think about it. When a couple stands at the altar and says, “I do,” what they are essentially saying is “I’LL DO you, you’ll DO me, and we won’t DO anybody else!” While marriage has many other wonderful, challenging and fascinating aspects, it is first and foremost a sexual agreement.
“That is why a man leaves his father and mother and is united to his wife, and they become one flesh” – Genesis 2:24
Oh I know, I know, there is more to marriage than just sex… just as a house is much more than its concrete foundation. Indeed, the house may have many beautiful rooms that contain countless valuable treasures of far more interest and allure than the foundation. But remove the foundation and that house will come crashing down – no matter how beautiful the rooms or valuable the contents inside.
Yes there is more to marriage than sex. There is love: but you don’t need a marriage license to love someone. There is commitment; but you don’t need a marriage license to be committed to someone. There are financial considerations; but you can totally support someone financially for the rest of their life without the need of a marriage license. There is also friendship: but you can be the best friend in the world to someone without marrying him or her. There are even spiritual considerations and perspectives like serving God together; but you don’t need a marriage license to do that either. Only when it comes to sex does God require the covenant of marriage.
quote found on http://loveseatmarriage.com/1-firm-foundation/