We are physical and spiritual beings. What we do physically has a spiritual side to it. Sex has deep spiritual meaning, and participating in it makes you live the spiritual part, even if you don’t understand that.
God explains all though the Old Testament that we are to have only one God and we are to be true to Him. He talks of being a harlot (or having sex outside of what it was created for) as being like being a harlot. Now, I don’t understand where God is coming from on this, but I trust Him. God says there is spiritual meaning to sex, and so there is.
God gave the Song of Solomon to the bible that gives a story of the wonders of sex as He gave it to us. For people who give their life to God to live as He created us to live, the rewards are greater than any adjective I can think of. The opposite is also true. We live by grace, we simply can’t make ourselves Holy enough, but we can’t be harlots and still have that Grace. By repenting, or turning ourselves around to His way, we can through Christ’s blood. It takes true repentance.
If this is the truth, and the bible says it is, then it is up to parents to get this truth into our children.
It amazes me that our young people say they know all about sex yet they don’t understand the first part of what it is or what it is for!