Coming Out of Homosexuality. A True Story

Some people say that "gay" people are born that way; it's in their genes.
Some people say it's because of an overbearing or absent father.
Others blame a dominating mother, or being dressed as the opposite sex as a child. What about emotional issues like abuse, trauma, or rejection?
What do you think?
This book is a true story of a lonely boy, growing up. His mother died and he spent ten years in boarding school. By age sixteen, he realised he was "gay". After several one-sided relationships, he met someone and shared mutual affection. They lived together as a couple. This story could have ended: "And they both lived happily ever after."
Then God showed up! Both guys became Christians the same day.
Would anything change?