Knock knock. Who's there? Donut.

Donut who? Donut even think about glazing over this punchline; it's sure to be sweet!

Knock knock. Who's there? Isadore.

Isadore who? Isadore a way to *bolt* this conversation open, or are we just going to *hinge* on this preamble without getting to the *pane* point?

Knock knock. Who's there? Wu

Wu who? Wu don't know, it's a Chinese puzzle to me, but I'm paws-itive I'll figure it out, fur-get about it!

Knock knock. Who's there? Pecan.

Pecan who? Pecan-der this: it's a nut-terly punishing joke, but I shelled out for the delivery!