People have a need for human companionship. Whether or not we interpret the creation narrative literally or metaphorically, Genesis 2 reveals that God's provision for human intimacy was the creation of male and female. Something happened during Adam's deep sleep. A special work of divine creation took place. The sexes became differentiated.
Heterosexual fidelity is the divine intention.
Any sexual behavior outside of this definition, whether heterosexual or homosexual, is displeasing to God. Refuting Contemporary Pro-Gay Arguments 1. Thus we cannot use these texts to address the contemporary issue of same-sex unions. And since that order was established by creation, not culture, its validity is both permanent and universal. This argumentation is opposite of the 'biblical literalism' of which the gay lobby tends to accuse us.