The subject of Physiology and Anatomy has taught us a great deal about the systems and functions of the human body including the human sexual systems and functions known as the Human Reproductive System.
There had been so many findings about it through scientific studies but the question as to why God created the sexuality of the human being has not become a dogged interest for many as the degree of pursuit that scientific studies had been done on human sexuality. God's creation of human sexuality in terms of its purpose and utilization is in fact more credibly exciting than the irresponsible claim of many as can be gleaned from the statement, "it is how humans are made of - sexual beings, so we just have to use this endowment, so to speak, anytime we want with whoever we want to do it with". This mindset is totally devoid of sexual responsibility. Yes, sexual responsibility. I am totally aghast with so much literature about sexual techniques in "lovemaking" by some so-called "experts" but in truth it is not "lovemaking" they are talking about. It is plainly "lust-making". When people engage in sexual activity and afterwards go their separate ways (casual sex), that is really both hurting each other physically and emotionally. Do you have any idea that such action breaks the respect one must have for each other as a human being? If it's okay for somebody for his or her respect to be broken and breached and violated, then that's the perfect way to go - engage in casual sex. And it is not only your emotion that is hurt in the process but also your physical being. Joining together in the act of sex actually tears and breaks tissues that are directly involve in the physical contact. It will definitely leave pain and scar in each other. And no matter how each one that is involve in the casual sexual act try to assuage their gnawing feeling as a natural effect of this wrong action, it will remain inside their hearts. Assuaging the pain and attempting to heal the scar brought about by casual sexual act by any kind of justification will never heal the pain and will never clear the scar but rather you are covering in such assuaging and such attempt an unknowingly "rotten wound".
For this reality of our sexuality, there is really nothing wrong if we desire to get into sexual activity with someone. That is totally natural. We can even love it. I am saying "love it" because some people are viewing it as filthy and bad. That is a very wrong mindset that is an extreme contrast to the thinking earlier mentioned. Physical ecstasy is created by God. He created it for it is good in his eyes (that is an unquestionable fact as proven by human's actual ecstatic experience of it) and He made it for humans' enjoyment as well as for procreation. However, there are certain laws to follow for its use. And one basic law for its use is to use it out of love and not to cause scars both physically and emotionally to another person. That's basically the law of love. Love is not hurting. Love does not seek that which may cause someone anything harms both physically and emotionally. When sexual act is really done out of love - that is it is within the context of a committed relationship - marriage; and pursued from the very start of a relationship with love, lust (which is that natural desire for sexual gratification and not the greedy desire for it as what is being referred to by the word lust) is really a beautiful thing that can be mutually shared by each partner. Within this context lust is shared in the spirit of respect for the other person. This is actually a natural effect of real love. It is something not enforced on your partner but because of your committed love for each other, you share it with each other to your mutual satisfaction.
Love can never be negated from order for the reason that when God created everything in this world in order, it was out of love. I can't be scientific about it because I am not a scientist but common sense is quite enough to make all of us understand what order means as we look at the solar system, for example. If all the planets in the solar system do not follow natural order in their revolution and rotation as they hang in space, they could collide with each other and would have put our very existence to end. In human sexuality, there are certain orders to follow if we want to engage in it. But very sadly, the world has gone to a great extent of violation of these orders on human sexuality set by God for us. If only humans follow the greatest book of instructions (the bible) on how we should live our sexual lives, this world we live in would definitely be a peaceful place. A great disobedience to the purpose of human sexuality written in this book has been one of the great causes of rifts in humans and all kinds of societal problems brought about by sex diseases like AIDS, cancer, etc. People lust for the sake of lust but in the guise of love. If people only know what love is, for sure they can't be lured to casual sex. But because of their lack of understanding about love, they easily get deceived by lust because it is presented deceptively as love. Let me say that again. Lust is deceptively presented to the world as love. In effect, people are making lust sound like love and in the process the right order for sexual act has been brought to a chaotic state. Some people may have continuously attempted to make plain lust sound like love as can be seen and read in many sex literatures and media, but the truth will remain that lust for what it is will be recognized as such as well as what real love is; and the correct order for the use of the latter will be known to many, and live their sexual lives accordingly.
