Let’s try a little thought experiment: Let’s imagine that now, after legally recognizing intrinsically non-marital same-sex unions as “marriages,” we notice that there remains a unique type of relationship that is identified by the following features: it is composed of two people of major age who are not closely related by blood, are of opposite sexes, and engage in the only kind of sexual act that is naturally procreative. We decide that as language-users there must be a term to identify this particular, commonplace, and cross-cultural type of relationship. Let’s call it “huwelijk.”
In this thought experiment in which the term “marriage” would denote the union of two people of the same sex and “huwelijk” would denote the union of two people of opposite sexes—both of which provide the same legal protections, benefits, and obligations—does anyone believe that homosexuals would accept such a distinction?