“In the third part, in order that we may say something about the estate of marriage which will be conducive toward the soul’s salvation, we shall now consider how to live a Christian and godly life in that estate. I will pass over in silence the matter of the conjugal duty, the granting and the withholding of it, since some filth-preachers have been shameless enough in this matter to rouse our disgust. Some of them designate special times for this, and exclude holy nights and women who are pregnant. I will leave this as St. Paul left it when he said in I Corinthians 7[:9], “It is better to marry than to burn”; and again [in v. 2], “To avoid immorality, each man should have his own wife, and each woman her own husband.” Although Christian married folk should not permit themselves to be governed by their bodies in the passion of lust, as Paul writes to the Thessalonians [I Thess. 4:5], nevertheless each one must examine himself so that by his abstention he does not expose himself to the danger of fornication and other sins. Neither should he pay any attention to holy days or work days, or other physical considerations” (Luther’s Works, vol. 45, p.35-36).