2X2

It fits
Fits together like bricks
Stacked like Tetris
Locked in like Legos

Yin nested with Yang
Laying like spoons in a drawer
Cuddled up
Like Forrest Gump's peas and carrots

It's a two fer
A couple's day
A night out
A date

Three hundred and sixty five of them
And you have yourself an anniversary
Twenty five of those makes silver
Fifty is gold

Get enough of them in a row
Then one before the other
Or occasionally both at once
It becomes a shared headstone

Eternally granite
With beginning and ending dates
Side by side forever
Or at least until the next big change