Man Has to Control Himself

The whole basis and essence of marriage is that each gives himself or herself to the other, and they promise to remain faithful to each other and not give themselves to any other. By binding themselves to each other, and surrendering themselves to each other, the way is barred to the body of anyone else, and they content themselves in the marriage bed with their one companion. In this way God sees to it that the flesh is subdued so as not to rage wherever and however it pleases, and, within this plighted troth, permits even more occasion than is necessary for the begetting of children. But, of course, a man has to control himself and not make a filthy sow’s sty of his marriage.

Martin Luther
“A Sermon on the Estate of Marriage”
Luther’s Works, vol. 44, pp. 10-11