Phosphorescent.

I am not a heel,
But I will turn turn turn.

I am not a seal,
But I been learned learned learned.

I am not a lamb,
But I will sweep sweep sweep,
And curl and sleep
All at your feet.

I am not a room,
I will cave cave cave.

I am not a brute,
I will take take take.

And I am not a child,
But I am lost lost lost.
Become my place,
To lay the coals.

I am not a monster,
But I will eat your heart.