If we allow gays to marry, we'll have to allow Mormons to have 20 wives. No thank you.
Sure, if someone can make a convincing argument that certain people, when they are born, have a natural perdilection towards polygamy, and that it is not merely a choice they make when they subscribe to a certain religion.
__________________
Dr. Boogie: Everything is so simple when you have a rocket launcher for an arm!