 why is homosexuality a sin? Well, it's a really easy question to answer. The reason why homosexuality is a sin is because God said it was. It is not in keeping with what God has designed and because he is the creator, he determines its proper use, which is the body of male, with female, and so forth. Romans 1 makes this clear and that those that wish to continue in it and do so willfully, they will be judged and judged harshly. Paul also brings this up in 1 Corinthians 6, where he speaks about it being a sin. The Bible does call this an abomination. And the one way we can know this ourselves, even those who are not Christians, just by looking at the number of people who are depressed, who happen to be homosexual, how they live, the suicide rate is also something that's very high. And the Bible is clear in following what he has designed will lead you to have nothing but joy. As a matter of fact, everlasting joy. And so the reason why homosexuality is a sin, because the Bible says so, because God said so.