You can do stuff to ditzy chicks that smart ones won't let you do. You don't need to marry one though.
its similar to the strong bad ones that went around when I was in highschool.
[video=youtube;XAg5KjnAhuU]http://www.youtube.com/watch?v=XAg5KjnAhuU[/video]
Not sure if this has been posted yet, but I get a kick out of it everytime I watch it