"Reducing troth to Physical sex is to reduce human sexual intercourse to animal copulation. Physical intercourse is a good gift of the Lord which ought to stay in the marriage-room of the creation. If sex in principle can be had with anyone—so-called free love—without exception elements of selfishness, exploitation and insecurity enter in."

James H. Olthus, Wycliffe Dictionary of Christian Ethics, Carl F.H. Henry editor, p. 408