People come up with some pretty goofy theories.
I have a single friend who won't date anyone who doesn't have long earlobes. She says that successful men all have long earlobes.
Not long ago a Canadian psychologist announced that men with index fingers which are short compared with their ring fingers have problems with anger.
When I was a boy, many folks believed that the size of your forehead determined how smart you were.
Silly statements like these are how prejudices are formed. People are all different - the length of your earlobes, your forehead, and your index fingers not withstanding.
If we could spend as much time embracing people with unconditional love as we do categorizing, differentiating and branding people, we'd be a lot better off.