But some might say, "Waiting for marriage is unbearable and aggravating!" They're right! It's very similar to other difficulties requiring patience that believers must face, such as fasting, imprisonment, cold, sickness, and persecution. Lust is a serious burden. You must resist it and fight against it. But after you have overcome it, lust will have caused you to pray more and grow in faith.
From "Faith Alone," devotions by Martin Luther, April 24