Seriously. We all think/know/hope/expect our marriage to last forever. Well, guess what? Over half of all marriages do not work out; we know this and yet we still do not learn.
If you are rich- you need a prenup.
If you think that someday you will be rich- you need a prenup.
If you own anything, especially from before you were married- you need a prenup!
It's just always a good idea. And if you didn't draw up the papers before you got married, there is still time. Make a written legal agreement regarding assets NOW.
I didn't have a prenup my first time around, but it didn't really matter since neither of us owned anything. This time, for my second marriage, I did not get one. We now, between the two of us, own two new cars and a house. Believe me, drawing up a postnuptial agreement is VERY HIGH on my to-do list.
We all want to believe that love and marriage is everlasting. But it is a legal contract as much as it is a union before god. You need to protect your assets and hammer out any details before you end up losing everything in a bitter divorce settlement. Don't be "that person"; be prepared!