Movies
Opinions are like assholes; everybody has one.
— Harry • Dirty Harry
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker dismisses the value of opinions by comparing them to something everyone has but nobody necessarily wants to hear about. It's a blunt, crude way of saying that having a viewpoint isn't special or impressive. The humor comes from deflating self-important commentary with an earthy comparison.
Context reviewed