This is not how theology is made. I gave you the scripture. Please argue from scripture and history. Syllogisms about natural law are fun thing to argue about, but the issue is theological. What you are doing is, you are injecting a bourgeois 18-20cc individualistic mentality into the teaching of the 2,000 year old Church, and, of course, you say: This cannot be. I hear you, -- I am a product of 20c myself. But our social instincts are irrelevant to what Christ teaches.