Why A Duck?

A few posts ago KVers discussed the humor of their fathers. The above was some of the humor that those fathers grew up on. Eighty years later and it's hard to imagine anything as funny. Sort of topical with the value of real estate nose diving. There's
a quack at Bronx High of Science that also triggered the memory of this routine.
A transcript of some of the routine

HAMMER: Do you know what a lot is?
CHICO: Yeah, itsa too much.
HAMMER: I don't mean a whole lot. Just a little lot with nothing on it.
CHICO: Any time you gotta too much, you gotta whole lot. . .
HAMMER: Come here, Rand McNally and I'll explain this thing to you. Now look, this is a map and diagram of the whole Cocoanut section. . .Here's Cocoanut Manor. Here's Cocoanut Heights. That's a swamp; right over there where the road forks, that's Cocoanut Junction.
CHICO: Where have you got Cocoanut Custard?
HAMMER: Why, that's on the forks. You probably eat with your knife, so you wouldn't have to worry about that. . .Now, here's a little peninsula, and here is a viaduct leading over to the mainland.
CHICO: Why a duck?
HAMMER: . . .I say, here is a little peninsula, and here's a viaduct leading over to the mainland.
CHICO: All right. Why a duck?
HAMMER: I'm not playing Ask-Me-Another. I say, that's a viaduct.
CHICO: All right. Why a duck? Why a--why a duck? Why-a-no-chicken?
HAMMER: I don't know why-a-no-chicken. I'm a stranger here myself. All I know is that it's a viaduct. You try to cross over there a chicken, and you'll find out why a duck. It's deep water, that's viaduct.
CHICO: That's why a duck?
HAMMER: Look! Suppose you were out horseback riding and you came to that stream and wanted to ford over there. You couldn't make it. Too deep.
CHICO: But what do you want with a Ford when you gotta horse?
HAMMER: I'm sorry the matter ever came up. All I know is that it's a viaduct.
CHICO: Now look. . .all righta. . .I catcha on to why0a-horse, why-a-chicken, why-a-this, why-a-that. I no catch on to why-a-duck.
HAMMER: I was only fooling. They're going to build a tunnel in the morning. Now, is that clear to you?
CHICO: Yes, everything---except why-a-duck. . .
HAMMER: And then, there's a little clearing there, a little clearing around it. You see that wire fence there?
CHICO: All right. Why-a-fence?
HAMMER: Oh no. We're not going to go all through that again!