I am single never married 32 years old, and here is my answer.
If I ever going to get married, a prenup must be signed. I will probably not mentioned on the 4th date. However, I will probably bring it up when it is getting serious. No point of wasting each other’s time.
My logic: I have a house in my name fully paid. Why do I want to have someone comes in and has the right to claim half of it especially in the worse senario that its a short marriage without children. I have decent amount of cash, stocks, and Roth IRA why I have to sign half away. In addition, prenup doesn’t have to be all about money. I will probably put into some rules about living together. Of course, you should find this out before you get married, but nothing beats sitting down and writing them down.
Personally, I do have to ask other guys: Why buy the cow when you can get the milk for free? If you don’t buy the cow, you can have milk from many different cows with many different flavors (you know what I mean :P).