The Torah says:
When you take ... your enemies ... captive, and you see among them a woman of beautiful form, and you desire her, you may take her to yourself as a wife. [Deuteronomy 21:11]
But the Torah does not say: "If you have a strong craving for a bacon-cheeseburger, you may have it, but you must donate 100 times its cost to charity, to buy food for the poor."
So why does it allow the equivalent for the captive woman?
We can answer that the evil inclination and drivedesire for a beautiful woman is the strongest drive. But perhaps our commentators have more convincing answers.