That's what it's all about

So I finally had a real honest-to-God revelation, man.

And what's that, farmboy?

Well, I had that accident, you know? So I've been doing physical therapy all this time, learning to walk and other things. And I suddenly realized why I'm always so fuckin' unhappy. 

And why is that, pray tell?

Because I couldn't put my left leg in or my left leg out. And that's what it's all about.

Huh?

It's the hokey pokey. You know, "that's what it's all about." 

I'm not sure I understand, farmboy.

It's a joke.

Sheesh.