It is fine to voice high-sounding religious principles.
You said: "I have known a number of homosexuals who were celebate. They did not engage in homosexual conduct."
I can say that this is an unlikely scenario, having dealt with hundreds of homosexuals, most of them professionally, but also some who were friends.
(Don't look now, but they may be laughing behind your back...)
How do you know a man is committing adultery?
Remember visual/fantasy adultery is sin just as well.
How many ORDAINED PASTORS commit adultery?
How many are hooked on pronography?
Are they fit to be pastors?
Yes, there are men who are faithful to their wives and shun pronography.
And yes, that is often considered "a joke" by the majority.
If a life is fully surrendered to God, does God have the power to keep them from falling into their carnal propensities?