Just remember what happened to the boy who suddenly got everything he ever wanted...

“You, all right? I learned it by watching you!”

It’s called a shared cultural experience. Something we all grew up with, grew up surrounded by, so a passing reference to it will be understood by anyone who shares your cultural values. It’s a way to single out those who are like you in a crowd.

DURRRRRR

So maybe you've gotten here because you did a google search for
'world's largest wang' and my name popped up. Maybe you're one of the
two people who used to frequent this site when it was the world's
largest online source for David Lynch slash fiction. Maybe you're the
FBI.

You may have even come here because you're one of the 200
people a day who do a google image search for asshole.jpg and find this
fine looking fella: