What's My Sonnet About Again?

Piezoelectricity's my theme...
No wait, it's pilots, right, today's their day?
I know it isn't picene; I'd not dream
Of sonnetizing on some tar, okay?
Pirates are always good for some hum-arrr,
As are pinecones, what look like hand grenades,
And clear out drunks when flung into a bar.
A pie plate? No! Bad notions come in spades.
An idea must come soon on down the pike
Or I will pile up bad ones, call it good.
I'm not afraid, for this is nothing like
The demon writer's block, although I would
Appreciate a pica's worth -- I say!
I've got it! Have a happy, great π day!

In Which I Ponder A Happy Chain Reaction

It got its start when Kevin bought a house.
He is a bit carefree, I will just say.
My sister heard the news, began to grouse,
And came to the conclusion that she may
As well do so; if he could so could she.
She shopped around, and chose, and moved right in.
The dial took a spin and stopped on me.
I took the step, though not without chagrin.
I'm glad I did, and anyone who cares
May hear this tale, as did a pal of mine.
She caught the bug and now she boldly fares
Into the market, husband at her side.
Did Kevin start a cycle, or a tide?