Human sexuality is one of God's greatest gifts to us, but it can get out of hand because lust is nothing more than a poor second cousin to love. We need love. We need to offer love, and we need to receive it. I need you. Love involves reciprocity and mutuality.
Love involves caring about the needs of another person, forgiving easily and adjusting continually.
Lust just wants. To try to satisfy the deep hungering for love with nothing more than lust has the same problems as trying to slake a thirst with saltwater. If you're thirsty and all you're drinking is ocean water, you never overcome your thirst. It only gets worse. That's the problem with lust.