Did you have a marriage back up plan? [POLL]

You've heard of" the back up plan" right? No it's just a J-Lo movie.

In college one of my good friends was a girl. She was never my 'girlfriend' but we did end up making the 'backup plan' together. That's where you agree that you and a platonic friend of the opposite sex will get married if you're both still single when your're 35 or 40 or whatever. If I remember right, we were drunk at a party when we came up with the idea.

It was just one of those things you say to a friend and I never really expected it to happen and it didn't. She was married 3 years later, of course.

Some people say this is a bad idea because you could end up marrying someone who wasn't really marriage material.

Did you have a backup plan and how did it turn out?