Plenty of people preempt any discussion of certain topics and offer their spouse a "take it or leave it" choice.
The most common mechanism of doing this is a credible claim of future emotional reactions ("I wouldn't feel the same way about you if you have sex with other people"), or perhaps the reactions of third parties ("my mom would disown me if I married a non-Lutheran"). I don't see what makes this mechanism so unique.
Yes of course. But to do it with an elaborate plan, set in motion ahead of time and sprung on them unexpected, is a species of cold, reptilian logic that defies rationalization.
