The Christian bible is not direct of the reason why the God of Moses prohibits homosexuality, well He did not also say the reason with the commandment “Thou Shall not Kill”.
God loves us and he did not want us to indulge in acts or sin that will literally hurt us.
I believe God first implemented its prohibition in Leviticus 18:22.
“‘Do not have sexual relations with a man as one does with a woman; that is detestable.
— Leviticus 18:22 New International Version (NIV)
Even some preachers could only say “it’s because God says so”. But that reason is not enough. Through the years, I think I already found two reasons why God prohibits it.
1. God wanted man to multiply. Adam and Eve were created so they would have children, and their children will their own as well in the future.
This multiplication is needed so that God’s love, restoration and sovereignty can be spread throughout the world. Outside of the garden of Eden was a fallen and devastated world dominated by Satan. It was destroyed when Lucifer was kicked out of heaven after the head of the angels rebelled against God.
So in order to multiply, a man and woman should have sexual intercourse with each other. A homosexual relationship would stunt the multiplication.
2. God loves life and healing. Homosexuals lead in the HIV/AIDS death in the US and the Philippines, and I believe it’s also the same in the other countries. A gay man’s sexual activity is very much different than a straight guy. Gays are more aggressive and have more than one sexual partners at the same time.
In Denmark, gays with partners has an average life span of 51 years old, compared to married heterosexual men with 74.
3. Homosexuality is also linked to pedophilia. A lot of normal gays we know do engage in sex with minors. That would be dangerous to the children.
A friend I know was molested by an adult gay when he was 11. And yeah, he has homosexual tendencies now.
Pressure your gay friends about this, and chances are a lot of them actually are doing sex with minors.
4. Homosexuality can create mental instability. Yes, many gays are talented especially in the arts, in dancing and other fields. But during intense pressure and tension, they tend to become unstable.
Andreas Lubitz, the Germanwings pilot who intentionally crashed the airplane was a repressed homosexual. Even my gay friend gets chaotic when he is under constant pressure at work or in his relationship with other people. Just observe your gay friends.
God is love. He loves life and he loves us. God doesn’t want us to engage in activities that will eventually lead to our own suffering and death.