Knock knock. Who's there? Wire.

Wire who? Wire you not opening the door?

Knock knock. Who's there? Nana.

Nana who? Nana your business!

Knock knock. Who's there? Purpose.

Purpose who? That's what I've been asking myself for years.

Knock knock. Who's there? Sew

Sew who? Sew long, I've been trying to stitch together a decent joke.