Why get married if you have doubts about your sexuality , stay single and live your life, why make someone else's life a lie .
As someone who comes from a religious family, is queer and has had multiple relatives come out over the last decade, I can tell you that it's desperation. When you grow up hearing the parents you love with all your heart discussing how gay people should be put on an island and bombed because it's a disgusting perversion, it completely fucks you up. It's not a question of lying, it's a question of desperately wanting to believe it because being who you actually are would mean you lose *everything*.
Staying single is no good either, because you just get badgered and have nasty comments made like "you're not hiding being a woofter, are you?".
Also, it's worth pointing out that when Huw Edwards was born, you could still go to prison for having sex with another man. He would have been 5 when that law was repealed.
Anyway. Here we are, where everything is so much better.