I don’t think it’s wrong per se; I just think that if you genuinely hold to a Christian view of marriage then you are unlikely to want a prenup. Most people with a Christian view of marriage see it as the “two becoming one” and something that man should not separate.

A prenup seems to convey a mutual (albeit seemingly benign) level of distrust in the other—at which point I ask: “Why make the marriage vow in the first place?” If your relationship is such that neither of you can fully trust the other to stay until death do you part, then why vow to do so?

If your mutual view of marriage finds one leaving the other as a possible outcome, then marriage is not what you are looking for; rather, you’re looking for some aspects of marriage (sex, cohabitation, procreation, some level of mutual commitment), but not the full scope. In essence, you’re looking to be long term boyfriend and girlfriend.