I wouldn’t say that sex carries more significance than eating. We would die if we did not eat. Now, sex between two spouses is certainly more emotional than eating (I hope), but eating is at least as important as sex in the grand scheme of things.
Oh, but sex DOES carry more significance than eating! It is true that eating is necessary for us to remain alive, but sex is not. But as far as I know, eating is not involved in a covenant with God. Sexual relations between spouses IS involved in a covenant with God. A marriage forms a covenant with God. It is so important that it is a Sacrament. But it is not a full covenant until consummation and that is where sex comes in.
The act of sex has two purposes:
(1) procreation;
(2) showing and strengthening the bond between spouses.
If spouses have sex simply for the purpose of physical pleasure they are acting with less reverence to God than rabbits rutting in the forest. Sex is very, very, very SACRED, is tied in with the Church (she is the Bride of Christ), and every act of sex performed properly strengthens not only the bond between husband and wife, but the bond between God and the married couple.
St. Paul compared the love between husband and wife to the love between Christ and the Church:
Wives and Husbands. Be subordinate to one another out of reverence for Christ. Wives should be subordinate to their husbands as to the Lord. For the husband is head of his wife just as Christ is head of the church, he himself the savior of the body. As the church is subordinate to Christ, so wives should be subordinate to their husbands in everything. Husbands, love your wives, even as Christ loved the church and handed himself over for her to sanctify her, cleansing her by the bath of water with the word, that he might present to himself the church in splendor, without spot or wrinkle or any such thing, that she might be holy and without blemish. So [also] husbands should love their wives as their own bodies. He who loves his wife loves himself. For no one hates his own flesh but rather nourishes and cherishes it, even as Christ does the church, because we are members of his body.
“For this reason a man shall leave [his] father and [his] mother and be joined to his wife, and the two shall become one flesh.”
This is a great mystery, but I speak in reference to Christ and the church. In any case, each one of you should love his wife as himself, and the wife should respect her husband
(Ephesians 5:21-33, New American Bible, underlining added by this poster for emphasis)
I know this part of Scripture is confusing (and angers many people) because it speaks of submission of the wife to her husband in all things. I’m not trying to hijack this thread - what is stated there is poorly understood by most (including me). I posted it because it shows how the relationship between husband and wife is like the relationship between God and His Church.
Eating ice cream is so different that I’m having some problems comparing eating ice cream with sex. I think everyone has agreed so far that eating in a way that harms the body is wrong (as for culpability, that is a whole other thread as there are eating disorders).
If I eat ice cream, not in excess, and truly thank God for the gift of ice cream and the gift of the parts of my anatomy that allow me to enjoy eating ice cream (taste buds, etc.) I just can’t see anything wrong with my actions. I am using the body God created in love to enjoy what He also created (all those ingredients that, together, form ice cream).
God did not create our genitalia to be used to simply pleasure ourselves in a sexual sense. The role of sex in our lives is much more complicated (and sacred) than the eating of ice cream.
I’m doing a poor job of explaining as I am still learning about covenants and am not sure about the wording I have used. If someone understands what I am trying to say and can clarify, please do (I will appreciate it as it will also help me understand).