In any theology of human sexuality, one must first establish the differences between the sexes. It is clear from Scripture that God created only two distinct sexes that are complimentary of each other (Gen. 1:27). In this text we see that God made them “male and female he created them.” This teaches that there were two sexes created from the beginning. The purpose for the creation of the two different sexes is that they would “Be fruitful and multiply and fill the earth and subdue it” (English Standard Version, Gen. 1:28).It seems clear that the creation of two sexes was that they could, and would, be fruitful and multiply. If this was the initial design and purpose in the creation of the two distinct sexes; then it seems clear that there are only two genders.
It is also clear that the only healthy and proper sexual relationship is found between these two genders. This relationship is, of course, only healthy and proper in the marriage union that is here defined by God, “Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh” (Gen. 2:24).
It is crucial to recognize that God created male and female in His image. He created this way for a specific purpose and reason. If one is to try and change this by making their own assumptions as to how sexuality plays out, they are playing with a very hot and dangerous fire. This is so because humanity was created in the image of God and, being created in the image of God is very significant.
An understanding of what the words male and female mean will be beneficial. Male in Hebrew is, “zā·ḵār” and in Greek, it is, “arsēn” which always carries the connotation of “man”. Whereas the word female is, “neqē·ḇā” (nek-ay-baw´) in Hebrew and in Greek it is “thēlys” which always carries the connotation “female of the human species” or that of “woman.”It is a clear distinction of what it means to be gendered. It is not a system of making one’s gender. One is either male or female and that is it.
Several Scriptures attest to this design and purpose. One is Matthew 19:4-5 Jesus is seen to be teaching that God created from the beginning male and female (v. 4). He then goes on and states that man is to leave his parents and be joined to his wife and they are to be one flesh (v. 5). This is a clear representation of the purpose for creating man and woman that is seen in Genesis 2:24. It is to be joined in a unique bond that is only possible in a one-man and one-woman union. Bruce Ware wrote, “We are created to reflect his own nature so that we may represent him in our dealings with others…” (“Male and Female Complementarity and the Image of God.” Journal for Biblical Manhood and Womanhood 22-23). Ware goes on to say that the only way this can be accomplished is by staying within the established framework of the relationship of male and female (23).
Another text that drives home the point of male and female complementarity is that of Genesis 5:1-2. In this text, it is seen that God created them “male and female” (v. 2). The rest of the chapter then goes on and describes the children that came from Adam and Eve (vv. 3-32). Again, the purposes of the two distinct genders are shown by the list of children that came about by Adam and Eve coming together in a sexual union. This is the original and God-designed purpose for the two genders. That is why God only created male and female because that is the way it was, and is, supposed to be.
Even though this is the purpose and design, many have rejected this plan and purpose for their own devices. As can be seen in Romans 1:26-28. In this text, it is seen that man and woman have given up the “natural relations” for one another and have gone to a distorted method (vv. 26-27). This has caused God to turn them over to a debased, or reprobate, mind and God giving them up to do as they want (vv. 26,28). Here is man going against the perfect and amazing gift that God has given to them. Sex is a gift that does not have to be allowed to mankind. As Augustine wrote:
Whether, therefore, without intercourse, in some other way, had they not sinned, they would have had sons, from the gift of the Almighty Creator, Who was able to create themselves also without parents, Who was able to form the Flesh of Christ in a virgin womb, and (to speak even to unbelievers themselves) Who was able to bestow on bees a progeny without sexual intercourse… (“On the Good of Marriage.” St. Augustin: On the Holy Trinity, Doctrinal Treatises, Moral Treatises, 399).
Augustine is saying that God could make people, like Adam or as Christ was formed in the womb, without allowing mankind to indulge in the pleasure of sex. Basically, sex is a gift and mankind has done many things to distort and ruin this gift. The people like those seen in Romans one are the one’s who have distorted this view and made it all about pleasure and completely individualistic. Trevin Wax wrote saying that “We [are to] undermine the false notion that sexual activity is only about pleasure” by holding fast to the design of procreation (Holy Subversion: Allegiance to Christ in an Age of Rivals, 115). This cannot be achieved if the people who are participating in sexual intimacy are of the same sex or doing it for just pleasure.
To add to the point just stated, anything but a male and female sexual union in the covenant bond of marriage is abhorrent, disgusting, and ill-fitting. This can be seen in the Scriptures found in Leviticus 18:20-23. In these texts there is a warning to not lie sexually with one’s neighbor’s wife (v. 20), to commit homosexual sex (v. 22), or to commit a sexual act with an animal (v. 23). In another section of Leviticus, it is shown to be an abomination to commit these acts and the punishment is death (20:10-21). In the New Testament Paul wrote that neither the sexually immoral, adulterers, or homosexuals would inherit the kingdom (1 Cor. 6:9). Sexually immoral people can be described as those who have a sexual relationship outside the male/female covenant bond of marriage.
It seems clear from this short theology of human sexuality that the design is of two distinct genders. These two distinct genders are male and female, and they were so designed to be fruitful and multiply (Gen. 1:28). If this design is slighted in any way it is an abomination to the Lord (Lev. 18:20-23; 20:10-21). Those who behave in a way against it are given over and will not inherit the kingdom (Rom. 1:26-28; 1 Cor. 6:9). Sex is a gift from the Lord, and He does not allow for any deviation from His grand design. If one is to have sexual relations this is to be done in the covenant bond of marriage alone (1 Cor. 7:1-5). Marriage is not a requirement itself, but it is for any sexual act to take place. True correct human sexuality is found in this two-gendered system created by God for the proper continuation of humanity.