In the Prologue of Proverbs (chapter 1-9), one out of every four verses addresses the topic sexual sin.
Why is so much attention given to this topic? It is because the wise father knows that few other enticements have such power to deceive and destroy. The thing that makes sexual sin so deadly is that it takes something beautiful, something good, something for which we already have an intense appetite, and convinces us that it can be enjoyed in the wrong place at the wrong time and in the wrong way.

Although the wise father of Proverbs has counsel for the son's ears ("my sons listen to me and be attentive to the words of my mouth," 7:24), and feet ("do not stray into her paths," 7:25), the most important counsel is directed to his heart: "Let not your heart turn aside to her ways" (7:25).
When dealing with sexual sin, we’re dealing with a problem so powerful, it needs a powerful solution: a root-level change in the heart.

Where can such a change be found? Only in Christ and what he did at the cross. If you “beat” lust on your own—another sin, probably pride and judgmentalism, will spring in its place. And if you beat pride, another will replace it, possibly discouragement. And if you beat discouragement, another will replace it—possibly sexual sin again.

But there is only one place that will allow you to see both how heinous sexual sin is, and how exhilarating true love and forgiveness is: at the cross. What Christ did there can both restore your joy and destroy your sin; humble your pride and elevate your delight.

Rock of Ages, cleft for me,
Let me hide myself in Thee;
Let the water and the blood,
From Thy riven side which flowed,
Be of sin the double cure,
Save me from its guilt and power.