You hugged me today.
Which is fine I suppose-
There's nothing harmful in itself.
But I've heard it said
It's the principle of the thing that counts.
I am not afraid of a silly hug;
I'm not afraid of your touch.
I'm only afraid of this hug
Because a hug is a key.
Once you've hugged,
You've touched.
And touching is a dangerous thing.
Hugging is a dangerous key.
A key to open a door;
A touch that leads to more.  
A hug is vulnerable.
A hug is close.
Once you've been close,
Close becomes far,
And when close becomes far,
Close becomes closer
And far becomes further.
When you get too close
You begin to hurt.
And nobody likes to hurt.
So you see,
I'm afraid of this hug.