I don't think wanting a prenup means he doesn't trust you, he just wants to protect his assests.
But shouldn't he trust her enough to not feel the need to protect anything from her?
Personally, I just believe that a prenup is everything that a marriage shouldn't be.
I was actually briefly engaged to someone else before and he mentioned a prenup. I broke it off for a number of main reasons (he snooped on me even though I had done nothing wrong, he care more about money and material things than I would have liked, he was a bit of a snob, sometimes selfish, etc) but the prenup was one of them. Fortunately I married someone who never even considered a prenup because he feels about them the same way I do.
Call me a dreamer but whatever the statistics say about divorce rates, maybe part of the reason they are failing is because no one has faith in them to last anymore? If you set out "preparing for the worse" because statistics say there's a good chance it won't last, it feels to me like there's no faith in the marriage.
To me, it's kind of like saying "I have faith in God... but on the off chance that it turns out there is no God, here's my plan..." That's not having 100% faith and trust.
Disclaimer: I'm not saying everyone who gets a prenup will end in divorce and I'm not trying to judge anyone's personal relationship - I'm just saying how I feel about prenups in my relationships and suggesting a possiblity as to one of the many reasons so many marriages are failing these days.
You can call me an inexperienced fool if you want since I've only been married close to 3 months... but that's just how I feel. Maybe partly because my parents have been happily married for 30 years and never had a prenup... and partly because I am proudly a romantic dreamer. In love, we risk heartbreak all the time... yet we're unwilling to risk financial assets? It's just backwards to me....