Jerry and Elaine in “Unfinished Business”

Jerry

Boy, do you smell something?

Elaine

Do I smell something? What am I, hard of smelling? Of course I smell something.

Jerry

What is it?

Elaine

I think it's B.O.

Jerry

What?

Elaine

It's B.O. The valet must've had B.O.

Jerry

It can't be. Nobody has B.O. like this.

Elaine

Jerry, it's B.O.

Jerry

But the whole car smells.

Elaine

So?

Jerry

So, when somebody has B.O., the O usually stays with the B. Once the B leaves, the O goes with it.