Knock knock. Who's there? Wheat.

Wheat who? Wheat you waiting for, let me in, it's a-maize-ing!

Knock knock. Who's there? Dictionary.

Dictionary who? I'm not defining the terms of this conversation.

Knock knock. Who's there? Sew

Sew who? Sew long, I've been trying to weave a good joke.

Knock knock. Who's there? Pane

Pane who? I'm glass you're excited to meet me, but I'm a little transparent about my feelings.