This is an interesting concept, perhaps some sort of Abraham test: in the Old Testament, God asks Abraham to kill his son to prove his love for God. As Abraham is about to do it, God says, "no dummy, don't actually do it, I just wanted to see if you would. You pass." So if she's willing to do the prenup, that is enough, versus actually doing one.
Regardless, you have a perverse concept of women. They are clearly lesser beings to you, more like property. My guess is that some female in your life hurt you emotionally, or maybe you were raised in a home where your mom was treated like you espouse.