Excellent article, Kevin! An excerpt:
God’s creation is good. God loves His creation. God created us to be good—to be capable of sharing in divine love. Knowing we have fallen into sin and disobedience, He still loves us. But does this mean that “anything goes” and that “everyone will go to heaven”? Well, no. God loves us by calling us out of our sins—the very offenses that separate souls from God in this life (and that separate souls from God eternally in hell) if they are not repented. When the Jews talked about God “wiping away sins,” they referred to God’s willingness to allow us to be reconciled to Him if we repented our sins. God’s willingness for reconciliation with us was later sealed with blood—Christ’s blood—as a contract, the New Covenant of Christianity.
Love is of the Spirit
Now, you could use comparative anthropology to document all the varieties of human sexuality throughout history, the pagan delight in eros (erotic passion), the different cultural origins of polygamy and monogamy, and even the primitive origins of matrimony in theHieros Gamos between gods and women. But none of it means anything, really, because Christ instituted a new reality for us, a reality based not on the flesh but on the spirit, a reality based not on finding personal satisfaction in a romantic desire for another person but on serving others through holy love.
And the theological proof of this mystical understanding is obvious: look as hard as you can, but you will never find a single reference in the New Testament to “romantic relationships.” Sexuality has a temporal value in regard to the sacrament of Holy Matrimony for the sake of raising a family in holy service to God, but it has no enduring place in the Kingdom of Heaven.
True love, as Saint Thomas Aquinas explained, is “to wish the good of someone.”  Real love isnot self-indulgence. Real love does not plead with desperate, hollow eyes for recognition from an other. Real love is an act of will. Real love is, as Christ showed us through His personal example, total sacrifice of self for the sake of thesalvation of others. True love never turns to hate. True love never becomes a cult. True love never ends.
Eroticism has its basis in human survival. Our sexual organs have a natural, erotic potential so that primitive men and women would be inclined to copulate and reproduce. But this natural tendency is the result of Original sin, not of God’s original plan for humanity. So, as humanity matured, God gave us His commandments to protect us from the raw desires that make the body into a fetish, desires that cause us to see our reproductive organs as nothing more than the means to enjoy a raw pleasure severed from moral responsibility to the divine. Consequently, without God’s guidance, we are led by our desires far astray from the holy purpose God intends for us.
If you obey the commandments of the LORD, your God, which I enjoin on you today, loving him, and walking in his ways, and keeping his commandments, statutes and decrees, you will live and grow numerous, and the LORD, your God, will bless you in the land you are entering to occupy. If, however, you turn away your hearts and will not listen, but are led astray and adore and serve other gods, I tell you now that you will certainly perish.
And so, despite its glamorous portrayal in popular entertainment, eroticism is not love. Eroticism is not an expression of a man and a woman bonding into a family by their mutual love for God. Eroticism strips sexuality of its divinely intended function—reproduction—and reduces it to an exchange of using and being used. Eroticism is a form of idolatry—a body adoring a body, an expression of the lowest levels of desire—the allure of which resides in immediate, tangible gratification.
Moreover, as the blatantly dark Satanic side of eroticism shows us, this gratification has at its core a rejection of the Holy and a desire for the domination and defilement of others. Consider the most common curse in contemporary society: “F*** you!” Does that give you a clue? Consider also that Satanic rituals are conducted in the nude. Does that give you another clue? Social nudity is not an experience of a “natural” truth of the body; it is not “honest,” and it does not mean that “nothing is hidden.” Instead, it uses the lure of bodily gratification to draw attention away from the truth of the soul and to defile the soul’s opportunity to grow pure in chastelove.