The PCA position on sexuality can be summed up in a statement by the Stated Clerk of the PCA:
"There are several Presbyterian denominations in America. Sometimes people mistakenly attribute the views or actions of one Presbyterian denomination to another. The "Presbyterian Church in America" (PCA) is an evangelical denomination in the Reformed theological tradition. The PCA, like other Evangelical, Conservative, Orthodox, and Traditional Christians from many denominations, believes that, from creation, God ordained the marriage covenant to be a bond between one man and one woman, and that understanding is what the Church has always believed, taught, and confessed. Therefore, we believe that the divinely sanctioned standard for sexual activity is fidelity within a marriage between one man and one woman or chastity outside of such a marriage. Throughout history, there has often been a conflict between the unchanging standards of biblical ethics that the Church seeks to maintain and the changing social practices of the culture. The Presbyterian Church in America (PCA) has not redefined marriage nor does it intend to do so."
— L. Roy Taylor, Stated Clerk, General Assembly of the Presbyterian Church in America