A story put on a song? (To be asked in cereal advert dad voice)

There is a man we know
To whom we gave the name Tam
With facial lining like an old tyre
He makes he way across the road
We followed him
Because we wish to know
What it is that gave his face its detail

Up close his eyelids appear stuck
As if the mechanism died out halfway
He stares all the time
We look into the creases
Aging him like rings in a trunk

We watch him in the cafe
Pretend to know his life
Making amusement and biography
From the prompts below his scalp
He should be pleased that we've never seen his legs

Tam just looks
We are obsessed
We sketch his room
Because there is only one
His minimal kitchen
Not happy or lonely
Just thinking
Watching like us
But watching something really closely
And if we could find out what it was
We'd kill the character off
Our launch pad would be rubble

Tam stands
We try to smell him as he passes
Clues, anything, we need more
But gradually so
He leaves no tip
He leaves no mess
We have to wait for a new day to see him again
And when we do
His jacket flat
We see his eyes
Are wholly closed
We see his hands
Are like a Lego man's

Our hero is on his way out
The Tam we know will become a myth
We pay for his coffee and run