Love & marriage

When I was younger I always observed married couples and wondered how people can be blind when it comes to marriage. I often saw good looking girls married to ugly, fat guys(usually with horn rimmed glasses and bald heads) or handsome guys walking proudly down the street with very ugly girls. It irritated me until I finally found my own theory for the marriage mystery.
First, I had to classify people into two categories:
1- The cool guys and girls.
2- The nerd guys and girls.
The Story starts here,(School years):
The cool guys hang out with cool girls, have fun, party every night, very social and everybody loves them. Simply the popular school stars.
The nerds, living in the shadows of the hall ways of the school barely noticed, will try to approach the nerd girls. Nerd girls, always dreaming of the cool guys turn them down, guys walk away broken hearted. Nerd guys and girl never have a relationship and they start to focus on something else, usually their lessons.
And After many years (The happy ending):
They all grow up and start thinking about settling down. Everyone starts looking for a partner, but the choice is different this time.
1)Cool guys:knowing that they're not that cool anymore, they didn't care much about their education(but could still get a decent job), and they don't trust cool girls for marriage. They start looking for nerd girls. After all this is marriage, it doesn't have to be cool.
2)Cool girls:Had much fun when they were younger, but it's time now to go on, to look for the future. They're smart enough to know what's best for them, of course it's a nerd with a promising career and future. Guys with good jobs are guys with good money.
3)Nerd guys:They've been working hard enough for the whole of their lives, and this is what they deserve. A girl to compensate for all the years they spent building up their future.
4)Nerd girls: At last they can now show the world their partners with pride that of all girls, the nerd could catch the heart of this playboy.