Hey SeekingTruth, great question in your original post, I appreciate your candor in your thoughts. Although you ask, Why would a great God bother himself about such trivial details as human sex life when there is a great big universe out there and certainly more God sized things he should put his energies to?, I think a more fundamental question behind that is what is the relationship between God and sex? 

A great read on this topic is Sex & the Soul by Donna Freitas; she conducts a sociological study on college student’s perception of the relationship between God and sex. She looks at students at secular, catholic, and evangelical universities and through surveys, interviews, and written journal responses she unearths some fascinating discoveries and some heart-breaking stuff too. Students and secular and catholic schools feel exactly as you do, that there is no relationship between spirituality (God) and sexuality. Evangelical students on the other hand see spirituality and sexuality as intimately related. Why the difference? It has to do with worldview. Our sexual choices are processed through our understanding of how the world is. In a sobering passage in Sex & the Soul one can feel the authors own heart break and anger over youth at secular and catholic universities destroying themselves through their sexuality because they do not know how to consistently think through their sexual choices. The evangelicals she argues are the only students who think through their sexuality, a finding she was completely surprised to find. That being said, she does not argue that the evangelicals have the right worldview to process sexuality through, she was pointing out how because evangelicals do that these students are the better for it, and then she suggested that secular and catholic universities really provide some ethical framework for their students to help them instead of allowing students to continue to destroy themselves.  Also, evangelicals have their own issues with sexuality too as Freitas points out, such legalism, and lack of grace in dealing with sexual sin. I’ll write more on this below.

I am a Christian and I’d like to share with you why I think sex really matters to God. First, God created men and women, not only that, he also made them in his image (Gen 1:26-27). So what does that mean? Well, for starters that means humans were made for relationship. God is in relationship with himself and being made in the image of God means that we are built for and require relationship. God wants us to be in relationship to him, and in relationship with other people. Second, it means that God created and designed sex and intentionally made it pleasurable. Some Christians act like God was surprised to have discovered that sex felt good, and then was like “oh… wait… cut that out…” that it was a blunder of divine proportions. As a Christian I am so upset that we have let such an important and precious thing as sex be something that cannot be talked about. Christians need to start celebrating sex, give grace to those who have sinned, and be an example for that world of what healthy spirituality and sexuality looks like. Also in Genesis marriage is when “a man leaves his father and mother and is joined to his wife, and the two are united into one” Gen 2:24 NLT. When people have sexual intercourse they are making attachments emotionally and spiritually just like the physical attachment of a man’s penis penetrating a woman’s vagina (bet you didn’t see an Christian saying that… now did ya?) There is a physical connection that is seen, but there are also unseen emotional and spiritual connections as well. When that relationship breaks those emotional and spiritual attachments break as well and we are hurt. This is why sex is meant be enjoyed by one man and one woman married together in Christ-like affection for one another (Eph. 5:22-30).

Now what is marriage? Marriage is a mutual commitment of love between one man and one woman before God and in the presence of community for encouragement, care, and accountability. A wedding is supposed to a PARTYYYYYYYYYYYYYYY and of all the toaster ovens, and blenders, and wedding cards people receive as gifts God made sure his gift topped everyone else’s, and his gift keeps on giving (talking about orgasms not children here) and gives some more (okay now the children part) and thanks to modern medical advances such as Viagra His gift doesn’t even stop working.  

God has given us his ideal for relationships in his word, and God wants us to be in right relationship with him and each other and sex is a big relationship issue. These are just some thoughts, and I give the scripture references there to show why I think the way that I do and I hope you’ll check them out for yourself, I’m not trying to force anything on you, but just to share. I love you brother even though I don’t know who you are and that’s why I wanted to share with you and its my prayer that you receive these words in your heart.

Peace, and blessings