south and north pole
or
left and right hand
or
a girl and a boy
Men and women
-- negative polarity -- positive polarity
in the real world
Roads are an example of intersecting lines in the real world.
McDonalds Arches
Scales or balances.
On Batman(donnanonanon!)
Balls
A Jarlid
normal_distribution
Did you mean "real world examples of parallel lines"? If so, railroad tracks are a perfect example.
metals