Lust
Lust is one of the things of the world. It's in the Bible, I John 2:16-17, NIV. "For everything in the world—the cravings of sinful man, the lust of his eyes and the boasting of what he has and does—comes not from the Father but from the world. The world and its desires pass away, but the man who does the will of God lives forever."
Lust itself is a sinful behavior and is often used as an excuse for further sin. It's in the Bible, Matthew 5:28, TLB. "But I say: Anyone who even looks at a woman with lust in his eye has already committed adultery with her in his heart."
The lustful man will pay the consequences. It's in the Bible, Proverbs 6:25-29, NIV. "Do not lust in your heart after her beauty or let her captivate you with her eyes, for the prostitute reduces you to a loaf of bread, and the adulteress preys upon your very life. Can a man scoop fire into his lap without his clothes being burned? Can a man walk on hot coals without his feet being scorched? So is he who sleeps with another man's wife; no one who touches her will go unpunished."
God's grace enables us to say no to lust. It's in the Bible, Titus 2:11-12, NIV. "For the grace of God that brings salvation has appeared to all men. It teaches us to say "No" to ungodliness and worldly passions, and to live self-controlled, upright and godly lives in this present age."