Marriage is a sacred institution and gay marriage violates that sanctity. But the fact of public approval is critically important both for understanding both the reality of same-sex marriage and the reason why one of the more common objections to it is fallacious - that it will open the gates to other, less acceptable kinds of plural unions. Gay marriage arguments and motives would not be the case if society's norms remained static. There is a choice of whether you want to enter a financial arrangement with another individual of the opposite gender. Can a psychological theory of ideological differences explain contextual variability in the contents of political attitudes?