It's the third letter in my first name,
And the fourth in my last...
That is the letter I wear every day...
Dangling from a simple silver chain...
alongside my mood-key around my neck.

But it's not that it's in my name, first or my last,
But that it's the first in yours.
That is why I wear it.

And it dangles, bounces,
chills and warms my skin,
Every day...
A soft jingle follows me as it mingles with my key.

A could stop that jingle, but then the meaning is gone.
That letter, as you, belongs with the key,
For you, as you, hold the key to my heart.

That's all the meaning in a duo of charms.