(WARNING: this post has no scientific merit)
I want to talk about a phenomenon that, to my knowledge, has never been documented elsewhere.
There is a direct correlation between the quality of an individual's peripheral vision and the quality of their relationships with other human beings.
Of course, anyone can produce exceptions - medical conditions and so forth - but I'm talking about a general principle.
To state it another way: rude, self-centred people are less visually aware of those around them.
You can easily test this theory the next time you go to a supermarket or a party or drive on city streets.
So there's a degree of correlation between an individual's physical attributes and their psychological makeup.
It's all about a quality called perception.
Loud-mouthed barge-arses don't have it.