Twice as nice

So many good things come in pairs.
Like ears and socks and panda bears.
But best of all are sets of twins
with extra laughter, double grins.

There's so much fun in having two
With twice as many points of view.
So much alike forever links.
And yet they're also quite distinct.

They share a birthday and a name.
But moods and tempers aren't the same.
Although at times they may dispute.
Their loyalty is absolute.

From days of youth till life is done.
It's one for both and both for one.

 --unknown