Everywhere we turn in Puritan writing on the subject we find sex affirmed as good in principle. [William] Gouge referred to physical union as “one of the most proper and essential acts of marriage.” It was Milton’s opinion that the text “they shall be one flesh” (Gen. 2:24) was included in the Bible “to justify and make legitimate the rites of the marriage bed; which was not unneedful, if for all this warrant they were suspected of pollution by some sects of philosophy and religions of old, and latelier among the Papists.” William Ames listed as one of the duties of marriage “mutual communication of bodies.”
So closely linked were the ideas of marriage and sex that the Puritans usually defined marriage partly in terms of sexual union. [William] Perkins defined marriage as “the lawful conjunction of the two married persons; that is, of one man and one woman into one flesh.” Another well-known definition was this: Marriageis a coupling together of two persons into one flesh, according to the ordinance of God. . . . By yoking, joining, or coupling is meant, not only outward dwelling together of the married folks . . . but also an uniform agreement of mind and a common participation of body and goods.Married sex was not only legitimate in the Puritan view; it was meant to be exuberant. Gouge said that married couples should engage in sex “with good will and delight, willingly, readily, and cheerfully.” An anonymous Puritan claimed that when two are made one by marriage they
may joyfully give due benevolence one to the other; as two musical instruments rightly fitted do make a most pleasant and sweet harmony in a well tuned consort. Alexander Niccholes theorized that in marriage “thou not only unitest unto thyself a friend and comfort for society, but also a companion for pleasure.”
In this acceptance of physical sex, the Puritans once again rejected the asceticism and implicit dualism between sacred and secular that had governed Christian thinking for so long. In the Puritan view, God had given the physical world, including sex, for human welfare.
HT: Joe Carter at First Things, responding to my post on prayer before sex