Mate, as your aware I'm a moron.
I have no clue on what makes a "lefty" a "lefty" or a whata makes a "righty" a "righty"
Who'd have to ask the people whom use those descriptors, as I don't have a clue.
I will say this however it seems that those whom refer to others as "lefties" (and variation there of) seem to have the following attributes:
-Mono-theocratic presuppositions
-A distain/zero understanding of Scientific Method
-Political 'teamsters'
-Source blog sites that confirm their bias.
-Seem to be deliberately ignorant
-Exhibit the Dunning Kruger Effect
But yeah, I have no clue what makes a person "left or right". One day I hope someone can explain it in such a way that a moron like me can understand...