Earlier quoted context omitted.
I would marry someone I trusted to death and beyond, compared to which trusting with mere property is trivial. Yes, it's a risk... there's a saying about risk, though, isn't there? Let's give Mark the benefit of the doubt and assume he's marrying for love.
I would marry someone I trusted to death and beyond Of course, but as a rational being you ought to understand you are fallible, and may occasionally misplace trust, no?
Trust aside, people who truly love each other and are honest with each other sometimes do get into a relationship ending fight or stop feeling the spark they once did and break up. If two people know each other deeply enough to get married, their communication is hopefully open enough to be able to have a rational discussion about anything, including prenups, without hurting the other by bringing it up. After such discussion, if they come to the decision that the existence of the prenup would psychologically decrease the success rate of their marriage, they are welcome not to enter into such an agreement. But if they don't feel that that's the case, it makes a lot of logical sense to have one.
Disclaimer: I'm not married, and I honestly don't know which camp I'll fall into.