"So if you’re not happy unless you’re married to five other people, is that OK?” Santorum asked one student. “Reason says that if you think it’s okay for two [individuals to marry], then you have to differentiate for me why it’s not okay for three,” he argued later.
Basically, he didn't answer the question. Instead, he redirected the discussion to something else: polygamy. Santorum pulled what I call the "gays can't marry because if they are allowed to marry how can we prevent polygamy" tactic. By this logic, how can we allow anyone to get legally married, gay or straight, in this country? Why should polygamy be outlawed when we allow men and women to marry each other? Polygamy is the marital union of one man and several wives. It's been part of most religions and cultures through the ages. Why should we honor the happiness of a man and his wife while denying the happiness of a man and his wives? Allowing legalized monogamy between a man and a woman surely establishes a slippery slope towards polygamous lifestyles.