“We learn, for instance, that sexual intercourse belongs only in lifelong heterosexual marriage (Gen. 2:24; Mark 10:5-9; 1 Thess. 4:3-5). What is more, since marriage was established at creation, these divine standards apply to everybody, not just to believers. It is impossible, therefore, to limit the faithful teaching of biblical sex ethics to the congregation; we also have to be involved in public discussion about marriage, about divorce, about the remarriage of divorced persons and about homosexual partnerships. Christians should discuss these issues thoroughly and should use the pulpit to do so clearly and bravely.”
Stott, The Challenge of Preaching, p. 38