Having faith is believing in something without having a reason... and therefore having faith is being unreasonable.
I wonder what they would say if you asked them, "If you were gay, would you want to get married?"
That would probably have been an interesting conversation.
I remember, back when I was religious, I asked someone why they were gay... to my astonishment he replied, "God made me gay." It's strange to think that the answer confused me, when it's so obvious to me now.