The absence of God in their life. Homosexuality is a sin and expressed so in the Bible. If you adhere to Scripture the mis-leading of Satan will not infiltrate your life.
If you read testimonies of those who left the lifestyle, you'll see a common pattern including but not limited to missed relationships, abuse, etc.
So since salvation, you've adhered to scripture and you've had no problems with Satan and his resultant sin in your life?
You are unique among Christians. Most use the crutch of and need of grace to explain their still sinful ways.