Logic Framework to test the Question: Why do beautiful women marry unattractive men and good looking men marry beautiful women?

Some people have this idea that although Good-looking women marry not so good looking men, Good looking men do marry good looking women.  But is that true?  Here is an interesting mathematical argument.

Read Gayle Laakmann McDowell‘s answer to Why do good-looking women often marry men who are way less good-looking, while good-looking men often marry good-looking women? on Quora