DEUT1040 Carry out the laws of a non-Jewish woman taken captive in war. Our Sages teach, “Only in recognition of the evil inclination does the Torah permit marriage to the beautiful woman taken captive in war.” That is, because a soldier's state of mind during wartime is slightly crazed, if the Torah would forbid such marriages, the soldiers would ignore the prohibition and take such women anyway. The Torah therefore requires that first the man take her to his home, where for thirty days she mourns her parents and does other things that will make her much less appealing to him. Hopefully, by the time the month passes, she will appear disgusting in his eyes, and no longer will he be attracted to her. His passion for her will die down and no longer will he want her as a wife.