God invented sex but he also gave us boundaries that should be keept in those boundaries or it could becomes deadly and destructive. In some cases it can become like a drug and get addictive. It starts slowly it can destroy your mind, family, marriage, your future no one just wakes up and is addicted to porn, necrophilia, and other sick things out there. God created sex for marriage between a man and a woman only anything else is a sin and it's called fornication. Sex outside marriage can effect you! It breaks your heart ,effects you soul, unwanted pregnancies, sexual transmitted diseases and so forth. You don't have to believe the lies the culture tells you. As Christian we should be looking at what God's word says, not what the media and shows tell you. Parents should be honest with there kids not just tell them to remain virgins and that is all the education they get. I'm not preaching ignorance but truth. Tell them why they should not have sex ,teach them why it's wrong, and what the bible says. Have them ask questions so that they are not left curious about the facts of sexual intercourse. God says sex is good in marriage and wrong outside of marriage. All sin is pleasurable for a season then the wages sin come.
But if they cannot control themselves, they should marry, for it is better to marry than to burn with passions.1 Corinthians 7:9