If you don't believe that leagues exist, then why not exactly?

How does a chav date a rah, or somebody in a higher socio-economic bracket? Would Sir Richard Branson or Mittal (or any other wealthy British person) date a chav? How many chavs now are dating millionaires, or billionaires even?

And don't good looking people generally date other good looking people?

Don't people with PhDs generally date others who are well educated?

Do rabid atheists often date staunch theists?

If a basic rule (if rules exist in life, I'm not sure they do) of relationships is that like attracts like, then how can leagues not exist?