The Bible is not a law book, though many treat it that way. The Bible is a narrative about a relationship between God and His people. Both Old and New Testaments use the image of marriage to depict that relationship. Adultery takes place all over the world, but there is no culture that sanctions adultery as a positive value. Regardless of how free we are with our sexual mores, when a couple gets married there is the expectation of fidelity. If a couple is serious about their relationship they guard themselves from temptations that would harm that treasured relationship. They choose not to do or say things that are destructive. That’s what Biblical “laws” are about. They give us guidance concerning the things that honor our Lord and those that don’t. We simply follow that guidance because the life we have found with our Lord is more precious and valuable than the things that would pull us away from Him. It is not a matter that we can’t do things, but that we don’t want to do them because they are hurtful to something we have that is far more beautiful.