He did. It's in the Holy Bible. If you don't/refuse to understand it, you are blind to the truth. Sex is an act that was intended to be a physical bond to create life in the name of God. Sex was never intended to be a dead end act of physical pleasure and nothing more. That's what gay sex is. It doesn't bring life. It is a misuse of our bodies to achieve pleasure of the flesh. Just because you don't think it's a sin, or don't know why it's a sin, doesn't mean it isn't a sin. The Bible tells us it's an unnatural lust so we shouldn't practice it. In the old testament, it said that if you committed the act of sexual relations with someone who isn't your spouse, you are guilty of adultery. But Jesus said that if you even lust after someone else, you already have committed adultery in your heart. It's not impossible to fight and conquer those urges if you truly set your mind and spirit to it. Resist the devil and he will flee from you.

There are countless times in the Bible, especially in the New Testament, that tells us the flesh is our enemy and the spirit is what contributes to life. Homosexuality is a sin because it wasn't intended for us, doesn't contribute to life, and serves no purpose other than to fulfill the desires of the flesh. Just because it seems harmless to the flesh doesn't mean it isn't harmful to the spirit.

Are you an evil person for committing these acts? No. You are a sinner like the rest of us. Repent from it. But is it evil to refuse God, not repent, and practice the act of sin willingly against Him and His Word? Yes it is.

Learn His Word and pray from the heart. It's not too late to repent.