It is true that Buttigieg is legally married, but that is a legal fiction. The Britannica Encyclopedia defines a legal fiction as "a rule assuming as true something that is clearly false." The idea that a man can have a husband is clearly false — he can only have a wife — despite claims to the contrary. Buttigieg's "marriage" is recognized by the positive law, or by what lawmakers and judges posit, but it is not recognized by the natural law. The natural law, which was first promulgated by Aristotle and Cicero (and later amended by Aquinas), holds that morality is a function of human nature, and that we can arrive at moral strictures on the basis of observation and reason. As human beings, Aquinas said, we are given to three natural inclinations, one of which is reproduction (the others being self-preservation and reason). Reproduction has been ordained by nature, and nature's God, as the province of a man and a woman. Two men cannot reproduce anymore than two women can. It therefore makes no sense to say that people of the same sex can marry.